In a vehicle lamp, a light guide body includes a rod-shaped first-light-guide-portion extending from one-end-side of the first-light-guide-portion facing a light source to other-end-side of the first-light-guide-portion, a plate-shaped second-light-guide-portion extending in a first-direction in which the first-light-guide-portion extends and a second-direction intersecting the first-direction, a third-light-guide-portion extending in the first-direction and a third-direction intersecting the first-direction and the second-direction and that establishes connection between the first-light-guide-portion and the second-light-guide-portion in the first-direction, an incidence-portion located on the one-end-side of the first-light-guide-portion, a reflection-portion located on one surface side of the second-light-guide-portion, an emission-portion located on the other surface side of the second-light-guide-portion, and a groove-portion located on the one surface side of the second-light-guide-portion which is closer to a third-light-guide-portion compared to the reflection-portion and extending in the first-direction. A depth of the groove-portion gradually decreases from the one-end-side of the first-light-guide-portion toward the other-end-side of the first-light-guide-portion.