A lighting device for a display device, comprising: a light source; a chassis including a bottom plate provided on a side opposite to a light exit side with respect to the light source, the chassis housing the light source; and a reflection member configured to reflect light and including a quadrangular bottom portion and at least two raised portions (25, 26), the bottom portion arranged along the bottom plate, and each of the at least two raised portions (25, 26) being raised from at least adjacent two sides of the bottom portion respectively toward the light exit side, and each raised portion (25, 26) having a side edge (25a, 26a) and the two raised portions (25, 26) forming a joint between adjacent two side edges (25a, 26a) of the raised portions (25, 26), wherein: the at least two raised portions (25, 26) include one raised portion and another raised portion, wherein the side edge of the one raised portion is provided with a facing portion which faces the side edge of the another raised portion by extending in a direction where the one raised portion is raised from the bottom, and wherein the one raised portion and the facing portion bulge toward the light exit side; wherein the lighting device further comprises an optical member provided on a side close to the light exit side with respect to the light source, wherein at least the one raised portion includes an extending portion at a distal end thereof and the extending portion extends outwardly; and the chassis includes a receiving plate configured to sandwich the extending portion with the optical member; and wherein the bottom and the one raised portion form a boundary that is bent with a crease and the one raised portion and the extending portion form a boundary that is curved without a crease. a light source; a chassis including a bottom plate provided on a side opposite to a light exit side with respect to the light source, the chassis housing the light source; and a reflection member configured to reflect light and including a quadrangular bottom portion and at least two raised portions (25, 26), the bottom portion arranged along the bottom plate, and each of the at least two raised portions (25, 26) being raised from at least adjacent two sides of the bottom portion respectively toward the light exit side, and each raised portion (25, 26) having a side edge (25a, 26a) and the two raised portions (25, 26) forming a joint between adjacent two side edges (25a, 26a) of the raised portions (25, 26), wherein: the at least two raised portions (25, 26) include one raised portion and another raised portion, wherein the side edge of the one raised portion is provided with a facing portion which faces the side edge of the another raised portion by extending in a direction where the one raised portion is raised from the bottom, and wherein the one raised portion and the facing portion bulge toward the light exit side; wherein the lighting device further comprises an optical member provided on a side close to the light exit side with respect to the light source, wherein at least the one raised portion includes an extending portion at a distal end thereof and the extending portion extends outwardly; and the chassis includes a receiving plate configured to sandwich the extending portion with the optical member; and wherein the bottom and the one raised portion form a boundary that is bent with a crease and the one raised portion and the extending portion form a boundary that is curved without a crease. the at least two raised portions (25, 26) include one raised portion and another raised portion, wherein the side edge of the one raised portion is provided with a facing portion which faces the side edge of the another raised portion by extending in a direction where the one raised portion is raised from the bottom, and wherein the one raised portion and the facing portion bulge toward the light exit side; wherein the lighting device further comprises an optical member provided on a side close to the light exit side with respect to the light source, wherein at least the one raised portion includes an extending portion at a distal end thereof and the extending portion extends outwardly; and the chassis includes a receiving plate configured to sandwich the extending portion with the optical member; and wherein the bottom and the one raised portion form a boundary that is bent with a crease and the one raised portion and the extending portion form a boundary that is curved without a crease.