Light source unit for vehicle lamp and vehicle lamp

The invention provides a light source unit for a vehicle lamp and the vehicle lamp, which can improve heat dissipation performance. The heat sink (5) has a plurality of fins (5c, 5d) protruding in a longitudinal plate shape in a state of being aligned in the width direction from a side opposite to the substrate mounting portion, and the plurality of fins (5c, 5d) include a first fin (5c) located above the female connector portion and second fins (5d) located at positions on both sides of the female connector portion in the width direction. The first heat sink (5c) is extended to at least above a male connector section (18) connected to the female connector section, and the second heat sink (5d) is provided such that at least a part of a side section of the male connector section (18) connected to the female connector section is exposed. 本发明提供一种车辆用灯具用光源单元及车辆用灯具，能够提高散热性能。散热器(5)具有以从与基板安装部相反的一侧沿宽度方向排列的状态呈纵板状突出的多个散热片(5c、5d)，多个散热片(5c、5d)包括位于母型连接器部的上方的第1散热片(5c)和位于宽度方向上的隔着母型连接器部的两侧位置的第2散热片(5d)，第1散热片(5c)延长设置至与母型连接器部连接