"I'm a Man" is a song written by The Spencer Davis Group singer-songwriter Steve Winwood and record producer Jimmy Miller.
Chicago version
Chicago Transit Authority (now known as Chicago) recorded a cover version of "I'm a Man" for their 1969 debut album, The Chicago Transit Authority. When the band's popularity surged after their second album, "I'm a Man" was released as the B-side to a re-release of "Questions 67 and 68".

Chicago's cover arrangement features an extended percussion and drum section with a total run time of 7 minutes and 40 seconds, and is based around the blues-rock guitar playing of Terry Kath, the drumming of Danny Seraphine, the bass of Peter Cetera, the soaring Hammond organ of Robert Lamm and the horn players periodically switching over to auxiliary percussion instruments, such as claves, cowbell, maracas, and tambourine. Kath, Cetera and Lamm each sing a verse apiece (singing not the lyrics as originally written), preluding Seraphine's extended drum solo before a return to the second and third verses and choruses that bring the song to a climactic drum roll, and finally leading into a guitar solo to bring the song to a dramatic close.

Chicago Personnel:
Terry Kath - lead vocals (first verses), backing vocals (choruses), fuzzed wah-wah electric guitars
Peter Cetera - lead vocals (second verses), backing vocals (choruses), bass
Robert Lamm - lead vocals (third verses), backing vocals (choruses), Hammond organ, maracas(?)
Danny Seraphine - drums, maracas(?)
Jimmy Pankow - cowbell, trombone
Lee Loughnane - claves, trumpet
Walt Parazaider - tambourine, tenor saxophone