Surface light-emitting device and display device

A surface light-emitting device, comprising:

• at lease one first light source;
• at least one second light source that emits light in a direction different from a direction in which the first light source emits light;
• a first light guide plate having (i) a first light-incident end surface on which the light emitted from the at least one first light source is incident, (ii) at least one second light-incident end surface on which the light emitted from the at least one second light source is incident, and (iii) a light-emitting end surface which is located in a position opposite to a position of the first light-incident end surface, and from which light that enters the first light guide plate is emitted;
• and
• a second light guide plate that (i) has a counter end surface positioned to face the light-emitting end surface, and (ii) carries out, from one of main surfaces of the second light guide plate, surface-emitting of light that enters the second light guide plate via the counter end surface;
• wherein
• the first light guide plate and the second light guide plate are formed integral with each other to provide a single light guide plate;
• and
• the single light guide plate has a slit between a part which serves as the first light guide plate and a part which serves as the second light guide plate.