A luminous flux control member comprising: an incident circular surface (S1) comprising a flat portion and adapted to be disposed so as to face a light source ; a first optical surface (S2) that is separated from the incident surface (S1) in a direction of an optical axis (OA) extending through the center of said incident surface perpendicularly to said flat portion of said incident surface (S1), said first optical surface (S2) having a circular shape according to a view along said optical axis (OA) and including a concave portion (S23) recessed toward the incident surface (S1); and a second optical surface (S3) that forms a side surface of the luminous flux control member, wherein the first optical surface (S2) includes a connection portion (S21) that connects the concave portion (S23) to the second optical surface (S3), wherein, the connection portion (S21) is annular shaped according to a view along said optical axis (OA), is flat and extends perpendicularly to said optical axis (OA) and has a predetermined radial width (Wl), and wherein the inner peripheral circular edge of said connection portion (S21) is connected to said concave portion (S23) and the outer peripheral circular edge of said connection portion (S21) is connected to said second optical surface (S3) so as to form a circular edge, so that the first optical surface (S2) transmits a part of incident light passing through the incident surface (S1) and reflects the remaining incident light onto the second optical surface (S3), and so that the second optical surface (S3) transmits a part of the incident light passing through the incident surface (S1) and reflects the remaining incident light onto the first optical surface (S2). an incident circular surface (S1) comprising a flat portion and adapted to be disposed so as to face a light source ; a first optical surface (S2) that is separated from the incident surface (S1) in a direction of an optical axis (OA) extending through the center of said incident surface perpendicularly to said flat portion of said incident surface (S1), said first optical surface (S2) having a circular shape according to a view along said optical axis (OA) and including a concave portion (S23) recessed toward the incident surface (S1); and a second optical surface (S3) that forms a side surface of the luminous flux control member, wherein the first optical surface (S2) includes a connection portion (S21) that connects the concave portion (S23) to the second optical surface (S3), wherein, the connection portion (S21) is annular shaped according to a view along said optical axis (OA), is flat and extends perpendicularly to said optical axis (OA) and has a predetermined radial width (Wl), and wherein the inner peripheral circular edge of said connection portion (S21) is connected to said concave portion (S23) and the outer peripheral circular edge of said connection portion (S21) is connected to said second optical surface (S3) so as to form a circular edge, so that the first optical surface (S2) transmits a part of incident light passing through the incident surface (S1) and reflects the remaining incident light onto the second optical surface (S3), and so that the second optical surface (S3) transmits a part of the incident light passing through the incident surface (S1) and reflects the remaining incident light onto the first optical surface (S2). <EOS>