According to an embodiment, a bed apparatus includes a frame, a side rail, and a holder. The holder is secured to the frame. The holder holds the side rail to make the side rail switchable between a first position state where the side rail is in a first position and a second position state where the side rail is in a second position lower than the first position. The holder includes: a lock portion to lock the side rail in the first position state; a cover portion to cover at least part of the lock portion; a lever portion to be operated to release lock of the lock portion; and a stopper portion to make it difficult for the lever portion to operate to release the lock. The bed apparatus that can prevent erroneous release of the lock can be provided.