Abstract: A foldable chair according to the present disclosure comprises a frame 1 comprising four connectors 11a, 11b, 12a and 12b for contacting the ground, eight slant supports 16a, 16b, 17a, 17b, 17c, 17d, 17e and 17f which are hinged with the connectors, two vertical supports 15a and 15b fixedly jointed to the connectors 11a and 11b, two front fixing connectors 14a and 14b fixed to the supports 16a and 16b and hinged with the supports 17b and 17f, and two rear sliding connectors 13a and 13b which slide up and down along the vertical supports 15a and 15b and are hinged with the supports 17a, 17c and the supports 17d and 17e; a seat cloth 2 comprising a pair of eyelets 21b and 21a for inserting the straight ends 161a and 161b of the supports 16a and 16b, respectively, a pair of eyelets 22a and 22b for inserting the vertical supports 15a and 15b, a pair of sheaths 23a, 23b for receiving the inclined ends 151a and 151b, respectively, and a pair of covers 24a and 24b for covering the sheaths 23a and 23b; and a pair of