A lighting tool (1A, 1B) for a vehicle comprising: a first light source configured to emit first light; a second light source that is disposed adjacent to the first light source and that is configured to emit second light in a same direction as the first light; and a projection lens configured to project the first light and the second light in a same direction, wherein the projection lens has a first lens body including a first incidence section disposed at a side facing the first light source and an emitting section disposed at a side opposite to the first incidence section, and a second lens body including a second incidence section facing the second light source, wherein the first lens body and the second lens body abut against each other in between a first boundary surface, which is provided between the emitting section and the second incidence section, and a second boundary surface, which provided between the first incidence section and the second incidence section from a boundary line with respect to the first boundary surface, wherein the first boundary surface and the second boundary surface intersect with each other and are disposed at an acute angle in a vertical cross-section including the boundary line therebetween, wherein among the first light that has entered inside of the first lens body from the first incidence section, the first light that is totally reflected at the second boundary surface is emitted from the emitting section to an outside of the first lens body, and among the second light that has entered inside of the second lens body from the second incidence section, the second light that has passed through the first boundary surface and the second light that has passed through the second boundary surface are emitted from the emitting section to the outside of the first lens body, wherein a refractive index of the second lens body is smaller than a refractive index of the first lens body, wherein the first lens body and the second lens body abut against each other via an intermediate layer, and the refractive index of the second lens body is equal to or smaller than a refractive index of the intermediate layer. a first light source configured to emit first light; a second light source that is disposed adjacent to the first light source and that is configured to emit second light in a same direction as the first light; and a projection lens configured to project the first light and the second light in a same direction, wherein the projection lens has a first lens body including a first incidence section disposed at a side facing the first light source and an emitting section disposed at a side opposite to the first incidence section, and a second lens body including a second incidence section facing the second light source, wherein the first lens body and the second lens body abut against each other in between a first boundary surface, which is provided between the emitting section and the second incidence section, and a second boundary surface, which provided between the first incidence section and the second incidence section from a boundary line with respect to the first boundary surface, wherein the first boundary surface and the second boundary surface intersect with each other and are disposed at an acute angle in a vertical cross-section including the boundary line therebetween, wherein among the first light that has entered inside of the first lens body from the first incidence section, the first light that is totally reflected at the second boundary surface is emitted from the emitting section to an outside of the first lens body, and among the second light that has entered inside of the second lens body from the second incidence section, the second light that has passed through the first boundary surface and the second light that has passed through the second boundary surface are emitted from the emitting section to the outside of the first lens body, wherein a refractive index of the second lens body is smaller than a refractive index of the first lens body, wherein the first lens body and the second lens body abut against each other via an intermediate layer, and the refractive index of the second lens body is equal to or smaller than a refractive index of the intermediate layer.