This chemical solution suction device (1) is provided with a piston holding mechanism (20) which holds a piston member (7), and with a cylinder holding mechanism (30) which holds a cylinder member (6). The piston holding mechanism (20) and the cylinder holding mechanism (30) are configured so as to be capable of moving such that the piston holding mechanism (20) and the cylinder holding mechanism (30) approach and separate from each other. Also, the chemical solution suction device (1) is provided with a pressing mechanism (50) which applies pressing force to either the piston holding mechanism (20) and/or the cylinder holding mechanism (30), thereby moving one of the piston holding mechanism (20) and the cylinder holding mechanism (30) from (i) a first state in which the piston holding mechanism (20) and the cylinder holding mechanism (30) are located close to each other to (ii) a second state in which both the mechanisms (20, 30) are separated from each other by a predetermined distance.
