A paper inner container for storage of a refilling liquid content, which has a suction port that is formed in an upper surface thereof and allows insertion of a suction tube of a pump configured to pump up a liquid content and to dispense the liquid content to an outside of the paper inner container; the paper inner container being made of a paper material having a thermoplastic resin laminated on both its surfaces, and comprising: four body panels (5, 6, 7, 8), which form a body having a square tubular shape by coupling an edge of one of the four body panels to a vertical direction sealing panel; characterized by a pair of upper-surface forming panels (15, 16) and a pair of side panels (18, 19), which are continuously provided on upper edges of the four body panels (5, 6, 7, 8) to form the upper surface of the paper inner container; wherein the pair of upper-surface forming panels (15, 16) face each other and overlap in a vertical direction of the paper inner container; wherein the pair of side panels (18, 19) are positioned between the pair of upper-surface forming panels (15, 16) to face each other and foldable up along with overlapping of the pair of upper-surface forming panels; wherein the pair of upper-surface forming panels (15, 16) have holes (23a, 23b), which are formed at centers of the pair of upper-surface forming panels to serve as the suction port; wherein one of the holes (23a, 23b), which is formed in at least a lower upper-surface forming panel of the pair of upper-surface forming panels (15, 16), is sealed by a tearable film; wherein after the body is formed the lower upper-surface forming panel is folded inwardly while the side panels (18, 19) are folded up to inner surface sides into a triangular shape and an upper opening of the body is closed by the lower upper-surface forming panel; and wherein a periphery of the lower upper-surface forming panel of the pair of upper-surface forming panels (15, 16), an upper upper-surface forming panel of the pair of upper-surface forming panels, and the pair of side panels (18, 19) are bonded to seal the paper inner container. four body panels (5, 6, 7, 8), which form a body having a square tubular shape by coupling an edge of one of the four body panels to a vertical direction sealing panel; characterized by a pair of upper-surface forming panels (15, 16) and a pair of side panels (18, 19), which are continuously provided on upper edges of the four body panels (5, 6, 7, 8) to form the upper surface of the paper inner container; wherein the pair of upper-surface forming panels (15, 16) face each other and overlap in a vertical direction of the paper inner container; wherein the pair of side panels (18, 19) are positioned between the pair of upper-surface forming panels (15, 16) to face each other and foldable up along with overlapping of the pair of upper-surface forming panels; wherein the pair of upper-surface forming panels (15, 16) have holes (23a, 23b), which are formed at centers of the pair of upper-surface forming panels to serve as the suction port; wherein one of the holes (23a, 23b), which is formed in at least a lower upper-surface forming panel of the pair of upper-surface forming panels (15, 16), is sealed by a tearable film; wherein after the body is formed the lower upper-surface forming panel is folded inwardly while the side panels (18, 19) are folded up to inner surface sides into a triangular shape and an upper opening of the body is closed by the lower upper-surface forming panel; and wherein a periphery of the lower upper-surface forming panel of the pair of upper-surface forming panels (15, 16), an upper upper-surface forming panel of the pair of upper-surface forming panels, and the pair of side panels (18, 19) are bonded to seal the paper inner container.