Sleepy Sleepers is a Finnish pop/rock/punk/comedy band founded in 1974 by its two front-men Sakke Järvenpää and Mato Valtonen in Lahti, Finland. Between 1975 and their break-up in 1990 they recorded and issued a total of 19 albums. Sakke and Mato eventually went on to form and front the internationally successful Leningrad Cowboys.