TURN SIGNAL LAMP FOR OUTSIDE MIRROR

A turn signal lamp for an outside mirror is disclosed. The turn signal lamp comprises a lens and a light source module coupled to one side of the lens. The light source module includes a printed circuit board (PCB), a PCB assembly including a light emitting diode (LED) disposed on the PCB to output light, and a light source module case configured to accommodate the PCB assembly in an internal space. The light source module case includes a recess formed horizontally along a circumference of a surface of the light source module case. The lens includes a lens protrusion in which a part of the lens protrudes in a shape corresponding to the recess. The lens protrusion is inserted into the recess to come into close contact with a front surface of the recess, so that the light source module and the lens are coupled to each other.