A testing jig for ventilator comprises a driving source and an air supply unit. The air supply unit has an air reservoir and a piston rod. The air reservoir is connected to a ventilator. One end of the piston rod is inserted into the air reservoir and the other end of the piston rod is located outside the air reservoir and connected to the driving source. Therefore, the piston rod can be driven by the driving source to axially move at different speed rates relative to the air reservoir, in order to supply air with different pressure to the ventilator for allowing the ventilator to perform tests with different functions.一種用於呼吸器之測試治具,包含有一驅動源與一供氣單元,供氣單元具有一儲氣筒與一活塞桿,儲氣筒連接一呼吸器,活塞桿之一端穿設於儲氣筒內,活塞桿之另一端位於儲氣筒外且連接驅動源,藉此,活塞桿能藉由驅動源之驅動而相對儲氣筒產生不同速率的軸向移動,用以供給不同壓力的空氣至呼吸器,讓呼吸器能夠進行不同功能的測試。10‧‧‧測試治具20‧‧‧驅動單元21‧‧‧驅動源22‧‧‧轉盤23‧‧‧曲柄臂30‧‧‧供氣單元31‧‧‧儲氣筒32‧‧‧活塞桿40‧‧‧導引單元41‧‧‧滑軌42‧‧‧滑塊
