Light emitting module and method for manufacturing light emitting module

A method for manufacturing a light emitting module comprising:

• providing a light source including
• a first surface having a pair of electrodes, and
• a second surface on an opposite side from the first surface;
• providing a light guide plate including a first main surface and a second main surface on an opposite side from the first main surface, the light guide plate defining a through-hole extending through the light guide plate from the first main surface to the second main surface, the through-hole having
• a first penetration portion disposed on a first main surface side,
• a second penetration portion disposed on a second main surface side, and
• an intermediate penetration portion connecting the first penetration portion and the second penetration portion, the intermediate penetration portion being narrower in width than the second surface of the light source;
• and
• disposing the light source in the second penetration portion of the light guide plate with a joining member being interposed between the light source and the light guide plate.