To provide a chair capable of effectively eliminating the possibility of catching a foreign object between a seat part and a support frame.

The chair C turns around the rear end of the seat part 1 between the use position U and the raised position S. The chair C has a support frame 24 for supporting the front end of the seat part 1 at the use position U in the cross direction from below. An abutting part A abutting on the center in the cross direction of the front end of the seat part 1 from below is disposed at the center in the longitudinal direction of the support frame 24, and a gap P is formed between a side edge part 1a of the seat part 1 and the support frame 24 with the seat part 1 abutting on the support frame 24 in the abutting part A.