A liquid pouring member comprising: a nozzle (2, 2b, 2e); a base (3, 3b, 3d, 3e) to be engaged with an opening of a container; a cylindrical skirt (4, 4b, 4d, 4e, 4f, 4g) extending from the base to be fitted into the opening of the container; wherein: the nozzle includes: a nozzle upper part (5, 5b, 5d, 5e, 5f, 5g) extending from an upper surface (16, 16e) of the base opposite the skirt, the nozzle upper part including an outlet port (7, 7e, 7f, 7g) for pouring a liquid content from the container; a nozzle lower part (6, 6b, 6d, 6e, 6f, 6g) formed in a radial inner side of the skirt while extending from a lower surface (17, 17e) of the base, the nozzle lower part including an inlet port through which the liquid content flows from the container; and an inner passage (9, 9e, 9d) formed from the inlet port to the outlet port while passing through the nozzle lower part and the nozzle upper part, wherein the nozzle lower part includes an end portion (11, 11c, 11d, 11e, 11f, 11g) with an inclined surface (12, 12f, 12g) in which the inlet port is formed, the end portion having at least a part protruding from the skirt; characterized in that a constriction (20, 20c) is formed inside the inner passage of the nozzle lower part; and the nozzle lower part and the skirt are configured to form a relatively radially wide portion (22, 22b, 22c, 22d, 22e, 22f, 22g) and a relatively radially narrow portion (23, 23b, 23c, 23d, 23e, 23f, 23g) between the nozzle lower part and an inner surface of the skirt adjacent to the nozzle lower part. a nozzle (2, 2b, 2e); a base (3, 3b, 3d, 3e) to be engaged with an opening of a container; a cylindrical skirt (4, 4b, 4d, 4e, 4f, 4g) extending from the base to be fitted into the opening of the container; wherein: the nozzle includes: a nozzle upper part (5, 5b, 5d, 5e, 5f, 5g) extending from an upper surface (16, 16e) of the base opposite the skirt, the nozzle upper part including an outlet port (7, 7e, 7f, 7g) for pouring a liquid content from the container; a nozzle lower part (6, 6b, 6d, 6e, 6f, 6g) formed in a radial inner side of the skirt while extending from a lower surface (17, 17e) of the base, the nozzle lower part including an inlet port through which the liquid content flows from the container; and an inner passage (9, 9e, 9d) formed from the inlet port to the outlet port while passing through the nozzle lower part and the nozzle upper part, wherein the nozzle lower part includes an end portion (11, 11c, 11d, 11e, 11f, 11g) with an inclined surface (12, 12f, 12g) in which the inlet port is formed, the end portion having at least a part protruding from the skirt; characterized in that a constriction (20, 20c) is formed inside the inner passage of the nozzle lower part; and the nozzle lower part and the skirt are configured to form a relatively radially wide portion (22, 22b, 22c, 22d, 22e, 22f, 22g) and a relatively radially narrow portion (23, 23b, 23c, 23d, 23e, 23f, 23g) between the nozzle lower part and an inner surface of the skirt adjacent to the nozzle lower part. the nozzle includes: a nozzle upper part (5, 5b, 5d, 5e, 5f, 5g) extending from an upper surface (16, 16e) of the base opposite the skirt, the nozzle upper part including an outlet port (7, 7e, 7f, 7g) for pouring a liquid content from the container; a nozzle lower part (6, 6b, 6d, 6e, 6f, 6g) formed in a radial inner side of the skirt while extending from a lower surface (17, 17e) of the base, the nozzle lower part including an inlet port through which the liquid content flows from the container; and an inner passage (9, 9e, 9d) formed from the inlet port to the outlet port while passing through the nozzle lower part and the nozzle upper part, a nozzle upper part (5, 5b, 5d, 5e, 5f, 5g) extending from an upper surface (16, 16e) of the base opposite the skirt, the nozzle upper part including an outlet port (7, 7e, 7f, 7g) for pouring a liquid content from the container; a nozzle lower part (6, 6b, 6d, 6e, 6f, 6g) formed in a radial inner side of the skirt while extending from a lower surface (17, 17e) of the base, the nozzle lower part including an inlet port through which the liquid content flows from the container; and an inner passage (9, 9e, 9d) formed from the inlet port to the outlet port while passing through the nozzle lower part and the nozzle upper part, wherein the nozzle lower part includes an end portion (11, 11c, 11d, 11e, 11f, 11g) with an inclined surface (12, 12f, 12g) in which the inlet port is formed, the end portion having at least a part protruding from the skirt; characterized in that a constriction (20, 20c) is formed inside the inner passage of the nozzle lower part; and the nozzle lower part and the skirt are configured to form a relatively radially wide portion (22, 22b, 22c, 22d, 22e, 22f, 22g) and a relatively radially narrow portion (23, 23b, 23c, 23d, 23e, 23f, 23g) between the nozzle lower part and an inner surface of the skirt adjacent to the nozzle lower part.