Foldable chair capable of being overlapped with other chairs vertically

A foldable adapted to be overlapped with other chairs of identical structure, comprising two front legs, two rear legs and a seat plate, wherein

• two front legs (1);
• an inner side of each front leg having a recess (11) for assembling a respective, rear leg (2) and a T-shaped buckle (12);
• and a hole (111) being formed in the recess for retaining a cover (14);
• the cover having a plug (141) and the plug (141) having a hook (142);
• a transversal rod (13) connecting the two front legs;
• the transversal rod having a trench (131);
• each of two sides of a top end of an outer side of each rear leg (2) having a post (22) for assembling a seat plate (3);
• a transversal bar (23) being assembled between two inner sides of the two rear legs;
• each of two ends of the transversal bar (23) having a strip (231) adapted to be embedded into the trench (131) of the transversal rod (13);
• each of two outer ends of a rear side of the seat plate (3) having a C-shaped tenon (31) which is adapted to be assembled to the T-shaped buckle at the inner side of the front leg;
• each of two ends of an inner side of the seat plate having a sliding groove (32) for receiving the post (22) of the rear leg;
• wherein when assembled, the T-shaped buckles (12) are aligned with the recesses (11) of the front legs;
• studs (21) are received into the recesses of the front legs (11);
• the covers (14) covering the holes (111) the plug (141) of the cover is inserted into the hole (111) of the recess of the front legs;
• the cover is firmly secured to the front leg free of any play;
• the post (22) of the front leg slidable in the sliding groove (32) of he seat plate;
• and the C-shaped tenon (31) of the seat plate (3) buckled to the T-shaped buckle (12) of the front leg.