Mecki Mark Men (MMM for short) were a Swedish rock band fronted by keyboardist Claes "Mecki" Bodemark. The group originally formed as a dansband in the mid-1960s, then called Mecki Mark Five, before adopting elements of psychedelic rock, jazz, and experimental music. A breakthrough performance at Stockholm's Experimental Jazz Festival in July 1967 helped establish the group, placing them at the forefront of Swedish psychedelic rock and its fledgling progg subgenre.

Mecki Mark Men went on to collaborate with other artists in the genres of pop music, opera, and musical theatre, and were one of the first Swedish rock acts to tour and release records in the U.S.