PROBLEM TO BE SOLVED: To provide a standing/seating support unit which has a simple structure and can be attached to a newly constructed chair and also to an existing chair, and to provide a chair with support unit including the standing/seating support unit.SOLUTION: A standing/seating support unit according to the invention is mounted on a seat of a chair and can incline forward a seat plate of the chair or return the seat plate to an original position before the forward inclining. The standing/seating support unit includes: a base capable of being attached on the seat a seat attachment part capable of being attached under the seat plate a connection mechanism connecting the base and seat attachment part and an electric actuator inclining forward the seat attachment part and return the seat attachment part to the original position before the forward inclining. The base is arranged with an engagement part and can be accommodated in a set part by engagement of the engagement part with the seat. The electric actuator is connected to both the base and seat attachment part, and operation of the electric actuator allows the seat attachment part to be inclined forward and returned to the original position before the forward inclining.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】 構造が簡潔で、新設椅子のほか、既存椅子にも取り付け可能な起立・着座補助ユニットと、その起立・着座補助ユニットを備えた補助ユニット付き椅子を提供する。【解決手段】 本発明の起立・着座補助ユニットは、椅子の座に装着して椅子の座板を前傾させ又は前傾前のもとの位置に戻すことのできる起立・着座補助ユニットであって、座に取り付け可能なベースと、座板の下に取り付け可能な座取付け部と、ベースと座取付け部を連結する連結機構と、座取付け部を前傾させ又は前傾前のもとの位置に戻す電動アクチュエータを備えている。ベースに係止部を設け、その係止部を座に係止することでセット部に収容できるようにした。電動アクチュエータをベースと座取付け部の双方に連結し、電動アクチュエータの動作によって座取付け部を前傾させ又は前傾前のもとの位置に戻せるようにした。【選択図】図1