The present invention provides a suction hand part (310) which is attached to the leading-end section (330a) of a multi-joint arm, which suctions a plate-shaped structure member (200) having a curvature at least in a predetermined direction, and which is provided with: a support part (311) that is attached to the leading-end section (330a) of the multi-joint arm; a pair of suction mechanisms (312, 313), that have a pair of suction surfaces (312c, 313c), disposed apart from each other in an X direction over the attachment position (P1) of the support part (311) attached to the leading-end section (330a); and a pair of first angle adjustment mechanisms (314, 315) that are capable of adjusting the angle of inclination, in the X direction, of each of the suction surfaces (312c, 313c) of the pair of the suction mechanisms (312, 313).