SLEEP APPARATUS

A sleep apparatus (10) includes: a mat main body portion (16) configured to support a user in a supine state; and a tilting mechanism (70L, 70R, 72L, 72R, 81) that, at the mat main body portion (16), periodically tilts a body of a user left and right, by alternately raising a right side supporting portion (16R), which includes portions supporting a right-side hipbone and a right-side shoulder blade of a user, and a left side supporting portion (16L), which includes portions supporting a left-side hipbone and a left-side shoulder blade of a user.