A distributor comprising: a first flow path (10A, 210A); a plurality of second flow paths (10B, 210B); and a first branch flow path (11, 211) for dividing the first flow path (10A, 210A) into the plurality of second flow paths (10B, 210B), the first branch flow path (11, 211) including a first communication flow path (12, 212, 217) communicating with the first flow path (10A, 210A); two second communication flow paths (13, 213, 218) each communicating with each of the second flow paths (10B, 210B); and two bent portions (14, 214, 219) each connecting the first communication flow path (12, 212, 217) and one of the two second communication flow paths (13, 213, 218), each bent portion (14, 214, 219) including an inner peripheral wall portion (14-1, 214-1, 219-1) including an inner face having a first radius of curvature, and an outer peripheral wall portion (14-2, 214-2, 219-2) including an inner face having a second radius of curvature larger than the first radius of curvature, each second communication flow path (13, 213, 218) including an inner wall portion (14-1, 214-1, 219-1) extending from the inner peripheral wall portion (14-1, 214-1, 219-1) of one of the two bent portions (14, 214, 219), and an outer wall portion (14-2, 214-2, 219-2) extending from the outer peripheral wall portion (14-2, 214-2, 219-2) of the one of the two bent portions (14, 214, 219), characterized in that the outer wall portion (14-2, 214-2, 219-2) has a liquid film separation unit (70, 270, 370), wherein a dimension between the inner wall portion (14-1, 214-1, 219-1) and the outer wall portion (14-2, 214-2, 219-2) of each second communication flow path is configured such that one end side that is a side of the bent portions (14, 214, 219) of the two second communication flow paths (13, 213, 218) is larger than an other side of each of the two second communication flow paths (13, 213, 218), with the liquid film separation unit (70, 270, 370) being a boundary. a first flow path (10A, 210A); a plurality of second flow paths (10B, 210B); and a first branch flow path (11, 211) for dividing the first flow path (10A, 210A) into the plurality of second flow paths (10B, 210B), the first branch flow path (11, 211) including a first communication flow path (12, 212, 217) communicating with the first flow path (10A, 210A); two second communication flow paths (13, 213, 218) each communicating with each of the second flow paths (10B, 210B); and two bent portions (14, 214, 219) each connecting the first communication flow path (12, 212, 217) and one of the two second communication flow paths (13, 213, 218), each bent portion (14, 214, 219) including an inner peripheral wall portion (14-1, 214-1, 219-1) including an inner face having a first radius of curvature, and an outer peripheral wall portion (14-2, 214-2, 219-2) including an inner face having a second radius of curvature larger than the first radius of curvature, each second communication flow path (13, 213, 218) including an inner wall portion (14-1, 214-1, 219-1) extending from the inner peripheral wall portion (14-1, 214-1, 219-1) of one of the two bent portions (14, 214, 219), and an outer wall portion (14-2, 214-2, 219-2) extending from the outer peripheral wall portion (14-2, 214-2, 219-2) of the one of the two bent portions (14, 214, 219), characterized in that the outer wall portion (14-2, 214-2, 219-2) has a liquid film separation unit (70, 270, 370), a first communication flow path (12, 212, 217) communicating with the first flow path (10A, 210A); two second communication flow paths (13, 213, 218) each communicating with each of the second flow paths (10B, 210B); and two bent portions (14, 214, 219) each connecting the first communication flow path (12, 212, 217) and one of the two second communication flow paths (13, 213, 218), each bent portion (14, 214, 219) including an inner peripheral wall portion (14-1, 214-1, 219-1) including an inner face having a first radius of curvature, and an outer peripheral wall portion (14-2, 214-2, 219-2) including an inner face having a second radius of curvature larger than the first radius of curvature, each second communication flow path (13, 213, 218) including an inner wall portion (14-1, 214-1, 219-1) extending from the inner peripheral wall portion (14-1, 214-1, 219-1) of one of the two bent portions (14, 214, 219), and an outer wall portion (14-2, 214-2, 219-2) extending from the outer peripheral wall portion (14-2, 214-2, 219-2) of the one of the two bent portions (14, 214, 219), characterized in that the outer wall portion (14-2, 214-2, 219-2) has a liquid film separation unit (70, 270, 370), wherein a dimension between the inner wall portion (14-1, 214-1, 219-1) and the outer wall portion (14-2, 214-2, 219-2) of each second communication flow path is configured such that one end side that is a side of the bent portions (14, 214, 219) of the two second communication flow paths (13, 213, 218) is larger than an other side of each of the two second communication flow paths (13, 213, 218), with the liquid film separation unit (70, 270, 370) being a boundary.