Scooby - Doo , Where Are You ! Genre Animation Comedy horror Mystery Adventure Children 's television series Created by Joe Ruby Ken Spears Developed by Joseph Barbera William Hanna Iwao Takamoto Fred Silverman Directed by Joseph Barbera William Hanna Charles A. Nichols ( 1978 ) Voices of Don Messick Casey Kasem Frank Welker Nicole Jaffe ( 1969 -- 70 ) Stefanianna Christopherson ( 1969 -- 70 ) Heather North ( 1970 -- 78 ) Pat Stevens ( 1978 ) Theme music composer David Mook Ben Raleigh Opening theme `` Scooby - Doo , Where Are You ! '' performed by Larry Marks ( 1969 -- 70 , 1978 ) George A. Robertson , Jr. ( 1970 ) Composer ( s ) Ted Nichols ( 1969 -- 70 ) Hoyt Curtin ( 1978 ) Country of origin United States Original language ( s ) English No. of seasons No. of episodes 41 ( list of episodes ) Production Executive producer ( s ) William Hanna Joseph Barbera Producer ( s ) Joseph Barbera William Hanna Don Jurwich ( 1978 ) Running time 21 minutes approx Production company ( s ) Hanna - Barbera Productions Distributor Taft Broadcasting ( 1969 -- 88 ) Great American Broadcasting ( 1988 -- 91 ) Turner Program Services ( 1992 -- 98 ) Warner Bros. Television Distribution ( 1999 -- present ) Release Original network CBS ( 1969 -- 70 ) ABC ( 1978 ) Picture format Film 4 : 3 480i Audio format Monaural Original release Original series September 13 , 1969 ( 1969 - 09 - 13 ) -- October 31 , 1970 ( 1970 - 10 - 31 ) Revival series September 9 , 1978 ( 1978 - 09 - 09 ) -- November 4 , 1978 ( 1978 - 11 - 04 ) Chronology Followed by The New Scooby - Doo Movies ( 1972 -- 73 )

Question: who sang the original scooby doo theme song
Answer: Larry Marks