<PAGE>      PAGE  1
000 A000000 09/30/97
000 C000000 320282
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 3.0.a
000 J000000 A
001 A000000 SMITH BARNEY MUNICIPAL MONEY MARKET FUND,INC.
001 B000000 811-3112
001 C000000 2128166560
002 A000000 388 GREENWICH STREET
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10013
003  000000 N
004  000000 N
005  000000 N
006  000000 N
007 A000000 N
007 B000000  0
007 C010100  1
007 C010200  2
007 C010300  3
007 C010400  4
007 C010500  5
007 C010600  6
007 C010700  7
007 C010800  8
007 C010900  9
007 C011000 10
008 A000001 SMITH BARNEY
008 B000001 A
008 C000001 801-3389
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10013
010 A000001 SMITH BARNEY
010 B000001 801-14437
010 C010001 NEW YORK
010 C020001 NY
010 C030001 10013
011 A000001 SMITH BARNEY
011 B000001 8-81777
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10013
012 A000001 FIRST DATA INVESTOR SERVICES GROUP
012 B000001 84-0000000
012 C010001 BOSTON
<PAGE>      PAGE  2
012 C020001 MA
012 C030001 02104
013 A000001 KPMG PEAT MARWICK LLP
013 B010001 NEW YORK
013 B020001 NY
013 B030001 10154
015 A000001 PNC BANK
015 B000001 C
015 C010001 PHILADELPHIA
015 C020001 PA
015 C030001 19103
015 E010001 X
018  000000 Y
019 A000000 Y
019 B000000  127
019 C000000 BARNEY0000
020 C000001      0
020 C000002      0
020 C000003      0
020 C000004      0
020 C000005      0
020 C000006      0
020 C000007      0
020 C000008      0
020 C000009      0
020 C000010      0
021  000000        0
022 A000001 GOLDMAN SACHS
022 B000001 13-5108880
022 C000001   1466716
022 D000001   1465024
022 A000002 MORGAN STANLEY
022 B000002 13-2655998
022 C000002   1039448
022 D000002    899080
022 A000003 MERRILL LYNCH
022 B000003 13-5674085
022 C000003    803241
022 D000003    857128
022 A000004 CITICORP SECURITIES
022 B000004 N/A
022 C000004    584987
022 D000004    604545
022 A000005 BEAR STEARNS
022 B000005 13-3299429
022 C000005    600060
022 D000005    641271
022 A000006 BANKERS TRUST
022 B000006 13-4941247
022 C000006    210974
022 D000006    216026
<PAGE>      PAGE  3
022 A000007 MORGAN GUARANTY
022 B000007 N/A
022 C000007    244638
022 D000007    286683
022 A000008 STATE STREET BANK
022 B000008 N/A
022 C000008    137214
022 D000008    173458
022 A000009 PAINE WEBBER
022 B000009 13-2638166
022 C000009    129672
022 D000009    137214
022 A000010 LEHMAN BROTHERS
022 B000010 13-2518466
022 C000010    140037
022 D000010    125670
023 C000000    5356987
023 D000000    5706099
024  000000 N
025 D000001       0
025 D000002       0
025 D000003       0
025 D000004       0
025 D000005       0
025 D000006       0
025 D000007       0
025 D000008       0
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027  000000 Y
028 A010000   2135928
028 A020000     12125
028 A030000         0
028 A040000   2511088
028 B010000   1852762
028 B020000     13658
028 B030000         0
028 B040000   1727293
028 C010000   1932333
028 C020000     16512
028 C030000         0
028 C040000   1879630
028 D010000   2238021
028 D020000     13618
<PAGE>      PAGE  4
028 D030000         0
028 D040000   2022562
028 E010000   2030053
028 E020000     13122
028 E030000         0
028 E040000   1976936
028 F010000   1880769
028 F020000     16113
028 F030000         0
028 F040000   2035769
028 G010000  12069866
028 G020000     85148
028 G030000         0
028 G040000  12153278
028 H000000         0
029  000000 N
030 A000000      0
030 B000000  0.00
030 C000000  0.00
031 A000000      0
031 B000000      0
032  000000      0
033  000000      0
034  000000 N
035  000000      0
036 B000000      0
037  000000 N
038  000000      0
039  000000 N
040  000000 Y
041  000000 Y
042 A000000   0
042 B000000   0
042 C000000   0
042 D000000   0
042 E000000  50
042 F000000   0
042 G000000   0
042 H000000  50
043  000000   2797
044  000000      0
045  000000 Y
046  000000 N
047  000000 Y
048  000000  0.000
048 A010000  2500000
048 A020000 0.500
048 B010000  2500000
048 B020000 0.475
048 C010000  5000000
048 C020000 0.450
<PAGE>      PAGE  5
048 D010000        0
048 D020000 0.000
048 E010000        0
048 E020000 0.000
048 F010000        0
048 F020000 0.000
048 G010000        0
048 G020000 0.000
048 H010000        0
048 H020000 0.000
048 I010000        0
048 I020000 0.000
048 J010000        0
048 J020000 0.000
048 K010000        0
048 K020000 0.000
062 A000000 Y
062 B000000   0.0
062 C000000   0.0
062 D000000   0.0
062 E000000 100.0
062 F000000   0.0
062 G000000   0.0
062 H000000   0.0
062 I000000   0.0
062 J000000   0.0
062 K000000   0.0
062 L000000   0.0
062 M000000   0.0
062 N000000   0.0
062 O000000   0.0
062 P000000   0.0
062 Q000000   0.0
062 R000000   0.0
063 A000000  55
063 B000000  0.0
064 A000000 Y
064 B000000 N
066 A000000 N
067  000000 N
068 A000000 N
068 B000000 N
069  000000 N
070 A010000 Y
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
<PAGE>      PAGE  6
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 N
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 N
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000         0
071 B000000         0
071 C000000         0
071 D000000    0
072 A000000  6
072 B000000   106392
072 C000000        0
072 D000000        0
072 E000000        0
072 F000000    13535
072 G000000        0
072 H000000        0
072 I000000      958
072 J000000       74
072 K000000        0
072 L000000       96
072 M000000       10
072 N000000      431
072 O000000        0
072 P000000        0
072 Q000000        0
072 R000000       13
072 S000000        7
<PAGE>      PAGE  7
072 T000000     2797
072 U000000        0
072 V000000        0
072 W000000       32
072 X000000    17953
072 Y000000        0
072 Z000000    88439
072AA000000        0
072BB000000        0
072CC010000        0
072CC020000        0
072DD010000    88361
072DD020000       78
072EE000000        0
073 A010000   0.0000
073 A020000   0.0000
073 B000000   0.0000
073 C000000   0.0000
074 A000000       73
074 B000000        0
074 C000000  5676795
074 D000000        0
074 E000000        0
074 F000000        0
074 G000000        0
074 H000000        0
074 I000000        0
074 J000000    21000
074 K000000        0
074 L000000    37222
074 M000000        0
074 N000000  5735090
074 O000000   154500
074 P000000     2221
074 Q000000        0
074 R010000        0
074 R020000        0
074 R030000        0
074 R040000     9538
074 S000000        0
074 T000000  5568831
074 U010000  5700565
074 U020000       11
074 V010000     0.00
074 V020000     0.00
074 W000000   0.9999
074 X000000   130920
074 Y000000        0
075 A000000  5599940
075 B000000        0
076  000000     0.00
<PAGE>      PAGE  8
077 A000000 N
SIGNATURE   IRVING P. DAVID                              
TITLE       CONTROLLER