A medium accumulating device has an accumulation table on which a medium is accumulated, an elastic member that supports the accumulation table, and an accumulation table detector that detects lowering of the accumulation table. It is sensed that the accumulation table inclined with respect to a lifting and lowering direction of the accumulation table lowers below a predetermined position to thereby determine whether or not a medium is accumulated on the accumulation table. This provides the medium accumulating device capable of determining whether or not a medium is accumulated whatever position the accumulation table may occupy.