A stay includes a first arm rotatably connected to any one of a body or a door openable to the body; a second arm, one end of the second arm being rotatably connected to the first arm and the other end being connected to any one of the body or the door. The first arm includes a resilient body, a slider urged by the resilient body to the second arm. A case slidably supports the slider toward the second arm, and a pressing part is abutted and pressured onto a cam face disposed to the second arm by the slider. An adjustment mechanism changes a pressing position between the cam face and the pressing part to a crossing direction with respect to a sliding direction of the slider and a rotation shaft axis direction of the second arm.