<TABLE> <S> <C>



<ARTICLE> 6
<CIK> 0000811869
<NAME> THE AAL MUTUAL FUNDS
<SERIES>
   <NUMBER> 4
   <NAME> THE AAL MID CAP STOCK FUND CLASS B
<MULTIPLIER> 1

<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          APR-30-1999
<PERIOD-START>                             MAY-01-1998
<PERIOD-END>                               APR-30-1999
<INVESTMENTS-AT-COST>                        561139510
<INVESTMENTS-AT-VALUE>                       621187176
<RECEIVABLES>                                 26287833
<ASSETS-OTHER>                                  199022
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                               647674031
<PAYABLE-FOR-SECURITIES>                      37313432
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      2054054
<TOTAL-LIABILITIES>                           39367486
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     544035659
<SHARES-COMMON-STOCK>                          1244530
<SHARES-COMMON-PRIOR>                           858826
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        4223220
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                      60047666
<NET-ASSETS>                                  16977384
<DIVIDEND-INCOME>                              5024539
<INTEREST-INCOME>                              1492753
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 8356472
<NET-INVESTMENT-INCOME>                      (1839180)
<REALIZED-GAINS-CURRENT>                       5548797
<APPREC-INCREASE-CURRENT>                   (57120248)
<NET-CHANGE-FROM-OPS>                       (53410631)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                      (764973)
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         454559
<NUMBER-OF-SHARES-REDEEMED>                   (130314)
<SHARES-REINVESTED>                              61459
<NET-CHANGE-IN-ASSETS>                      (77892763)
<ACCUMULATED-NII-PRIOR>                          27822
<ACCUMULATED-GAINS-PRIOR>                     31361052
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          4027980
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                8356472
<AVERAGE-NET-ASSETS>                          14446098
<PER-SHARE-NAV-BEGIN>                            15.78
<PER-SHARE-NII>                                  (.17)
<PER-SHARE-GAIN-APPREC>                         (1.27)
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                        (.70)
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              13.64
<EXPENSE-RATIO>                                   2.56



</TABLE>