SAMPLE CHANGER

PROBLEM TO BE SOLVED: To provide a sample changer which can easily open and close the openings of sample containers set up on a turned table. SOLUTION: In a sample changer which places a plurality of sample containers 3 having opened tops on a turntable 1 along a concentric circle drawn from the rotating shaft 2 of the turntable 1 and successively supplies the samples contained in the containers 3 carried on the turntable 1 for titration, etc., at a specific position N on the concentric circle, a lid member 4 which is provided with a rotation stopping section 4b that is engaged with the main body to prevent the rotation of the member 4 together with the turntable 1, is positioned above the concentric circle to cover the openings 3a of the containers 3, and is opened at the working position N so as to open the opening section 3a of the container 3 carried to the position N is provided.