A mattress in which a vibration is unlikely to be transmitted between different cushion members is provided. The mattress includes a mattress cushion on which a plurality of persons can lie in a left/right direction, the mattress cushion includes a plurality of cushion members that can be separated in the left/right direction, each of the cushion members is formed with a filament three-dimensional bonded member that includes a plurality of filaments, and includes a contact surface that is in contact with another cushion member adjacent to the cushion member and ends of the filaments of the cushion member do not enter the other cushion member adjacent to the cushion member.