Light source device and projector

A light source device comprising:

• a light emitting element outputting a light;
• a light guide member entered by the light output from the light emitting element;
• a supporting member supporting the light guide member in a groove portion;
• and
• a pressing member pressing the light guide member against the supporting member, wherein
• the light guide member has a first face and a second face located at sides opposite to each other on a first axis of the light guide member, a third face and a fourth face located at sides opposite to each other on a second axis crossing the first axis, and a fifth face and a sixth face located at sides opposite to each other on a third axis crossing the first axis and the second axis,
• the first face of the light guide member outputs a light guided through the light guide member,
• the light emitting element is provided to face the third face,
• the groove portion has a supporting surface facing the fourth face, and
• the pressing member has a first extension portion extending in a direction closer to a direction along the third axis than a direction along the first axis, and contacting the third face, a pair of second extension portions extending in a direction closer to a direction along the first axis than a direction along the third axis, and having one ends coupled to the first extension portion and the other ends fixed to the supporting member, and elastically deforms in a direction crossing a principal surface of the supporting surface to urge the third face.