Abstract: A hand for holding the substrate includes a hand main body and a plurality of seating members mounted on the hand main body and on which the substrate is to be seated. Each of the plurality of seating member includes a shaft member supported to the hand main body and a lever member that is supported to the shaft member and includes a first end portion including a seating portion on which the substrate is to be seated and a second end portion disposed on a side opposite to the first end portion across the shaft member. At least a part of the plurality of seating members further includes a biasing member for giving a force of rotating the lever member to the lever member such that the second end portion moves downward and a seating sensor configured to detect an upward movement of the second end portion.