Sleep apparatus

A sleep apparatus, comprising:

• a mat main body portion configured to support a user in a supine state;
• a tilting mechanism including a right side support portion and a left side supporting portion, and configured to, at the mat main body portion, periodically tilt a body of the user left and right, by alternately raising the right side supporting portion including portions supporting a right-side hipbone and a right-side shoulder blade of the user, and the left side supporting portion including portions supporting a left-side hipbone and a left-side shoulder blade of the user;
• and
• a plurality of supporting airbags provided at the mat main body portion, wherein
• the mat main body portion includes an upper side supporting portion, a lower side supporting portion, and a central supporting portion between the upper and lower side supporting portions,
• the mat main body portion is configured to alternately switch between a seat state and a bed state,
• the supporting airbags are disposed along a direction heading from the upper side supporting portion toward the lower side supporting portion,
• internal air pressures of the supporting airbags are respectively adjustable, and
• the internal air pressures of the supporting airbags are adjusted to cause the internal air pressures of the supporting airbags at the central supporting portion to be higher in the bed state than in the seat state.