Question: who sings the original scooby doo theme song
Answer: Nichols ( 1978 ) Voices of Don Messick Casey Kasem Frank Welker Nicole Jaffe ( 1969 -- 1970 ) Stefanianna Christopherson ( 1969 -- 1970 ) Heather North ( 1970 -- 1978 ) Pat Stevens ( 1978 ) Theme music composer David Mook Ben Raleigh Opening theme `` Scooby - Doo , Where Are You ! '' performed by Larry Marks ( 1969 -- 1970 , 1978 ) George A.