To provide a bed apparatus, preventing a sensor from giving a sense of incongruity to a user.

This bed apparatus includes: a bottom 20 whose longitudinal direction is regulated by the bed side and the foot side; a mattress 40 placed on the bottom 20; a detector 50 interposed between the bottom 20 and the mattress 40 to detect the kinetics of the user according to the pressure distribution from the user lying down on the mattress 40, and to recognize whether the user is in the condition of going to bed normally, in the fear of falling, in the condition of leaving the bed, in the condition of staying in the bed or in the falling condition; and a display device 63 for displaying the condition of the user depending on the recognition result of the detector.