PROBLEM TO BE SOLVED: To provide a bed-leaving determination device, a bed-leaving determination system, and a bed-leaving determination program capable of speedily and accurately determining the bed leaving of a user.SOLUTION: The device comprises: body motion acquisition means 40 for acquiring body motion information indicating the body motion of the user on a bedding; load acquisition means 40 for acquiring load information indicating a load by the user on the bedding; and determination means which determines the bed leaving of the user on the basis of time series variation in the body motion indicated by the acquired body motion information and the time series variation in load indicated by the load information.SELECTED DRAWING: Figure 3【課題】ユーザの離床を速やかに精度良く判定することができる離床判定装置、離床判定システム、及び離床判定プログラムを提供する。【解決手段】寝具上のユーザの体動を示す体動情報を取得する体動取得手段40と、寝具上のユーザによる荷重を示す荷重情報を取得する荷重取得手段40と、取得された体動情報によって示される体動の時系列変化と、荷重情報によって示される荷重の時系列変化とに基づいて、ユーザの離床を判定する判定手段と、を備える。【選択図】図3