A bed, comprising: a mattress; and a dryer configured to support and dry the mattress, the dryer including: a support having a top plate supporting the mattress and a side wall (512, 513) extending downward from the top plate and configured to contact an installation surface, the side wall (512, 513) spacing the top plate apart from the installation surface and having at least one side opening to allow a flow of air into the support; a fan provided inside of the support, the fan having an inlet to suction air and at least one outlet to discharge air; at least one supply duct coupled to the outlet of the fan; a discharge duct coupled to an outlet of the supply duct through which air is discharged upward, the discharge duct being exposed through a plurality of top openings formed in the top plate of the support so that discharged air flows toward the mattress; and a suction duct coupled to the inlet of the fan and having at least one suction port exposed through the side opening of the support to suction air through the suction port, characterized in that an inlet of the fan is provided at a bottom of the fan, and a top of the suction duct is formed with a mounting hole in which the bottom of the fan is mounted. a mattress; and a dryer configured to support and dry the mattress, the dryer including: a support having a top plate supporting the mattress and a side wall (512, 513) extending downward from the top plate and configured to contact an installation surface, the side wall (512, 513) spacing the top plate apart from the installation surface and having at least one side opening to allow a flow of air into the support; a fan provided inside of the support, the fan having an inlet to suction air and at least one outlet to discharge air; at least one supply duct coupled to the outlet of the fan; a discharge duct coupled to an outlet of the supply duct through which air is discharged upward, the discharge duct being exposed through a plurality of top openings formed in the top plate of the support so that discharged air flows toward the mattress; and a suction duct coupled to the inlet of the fan and having at least one suction port exposed through the side opening of the support to suction air through the suction port, characterized in that an inlet of the fan is provided at a bottom of the fan, and a top of the suction duct is formed with a mounting hole in which the bottom of the fan is mounted. a support having a top plate supporting the mattress and a side wall (512, 513) extending downward from the top plate and configured to contact an installation surface, the side wall (512, 513) spacing the top plate apart from the installation surface and having at least one side opening to allow a flow of air into the support; a fan provided inside of the support, the fan having an inlet to suction air and at least one outlet to discharge air; at least one supply duct coupled to the outlet of the fan; a discharge duct coupled to an outlet of the supply duct through which air is discharged upward, the discharge duct being exposed through a plurality of top openings formed in the top plate of the support so that discharged air flows toward the mattress; and a suction duct coupled to the inlet of the fan and having at least one suction port exposed through the side opening of the support to suction air through the suction port, characterized in that an inlet of the fan is provided at a bottom of the fan, and a top of the suction duct is formed with a mounting hole in which the bottom of the fan is mounted.