Lamp for vehicle

A lamp for a vehicle, the lamp comprising:

• a light source;
• and
• a light guide part disposed at one side of the light source and configured to receive light emitted from the light source,
• wherein the light guide part comprises:
• a front surface portion configured to define a front region of the light guide part;
• a rear surface portion configured to define a rear region of the light guide part;
• an upper surface portion configured to connect the front surface portion to the rear surface portion and configured to define an upper region of the light guide part;
• and
• a lower surface portion configured to connect the front surface portion to the rear surface portion and configured to define a lower region of the light guide part,
• wherein the light source comprises:
• a first light source disposed rearward of the light guide part to face the rear surface portion;
• and
• a second light source disposed below the first light source,
• wherein the lower surface portion comprises a downward protruding region comprising a portion protruding downward, the downward protruding region being at least partially provided rearward of the second light source,
• wherein the second light source is configured to emit light rearward toward the downward protruding region, and
• wherein at least a part of the downward protruding region, which faces the second light source, has a light reflection surface.