Abstract: A foldable tent (1), wherein a covering is supported by a plurality of columns (2) and an outer peripheral frame (3) and reinforcement frames (4) connected to the columns (2), the reinforcement frames (4) are formed so as to pass through the inside of a polygon in plan view formed of the outer peripheral frame (3) and disposed so as to connect the columns to the center of the polygon to more increase the strength thereof over a conventional foldable tent, parts of unit pipe bodies forming the reinforcement pipe units (41, 42) of the reinforcement frames (4) are horizontal relative to an installation surface or downwardly titled toward the center thereof to smoothly fold the reinforcement pipe elements (41, 42) when the tent is dissembled, and the reinforcement frames (4) are supported on the columns (2) or on the columns (2) through play allowing the reinforcement frames (4) to move within a specified range from a center column (5) in a generally circumferential direction to smoothly fold the foldable tent.