An LED lighting device includes a transparent cover member arranged at an exterior member or an interior member and covering an LED element and a light emitting surface of the LED element mounted on a substrate, and a light transmission member receiving emission light from the light emitting surface of the LED element at a light inlet end and operating as a light transmission path. The light transmission member is integrated with the LED element mounted on the substrate together with the cover member using a transparent resin by insertion molding.

A lamp for a vehicle and a vehicle including the same. One aspect provides a lamp for a vehicle, the lamp including: a first circuit configured to connect, in series, a plurality of LEDs disposed in first and second LED groups; and a second circuit branching off from the first circuit and connected to FET elements disposed in a matrix IC unit, in which the first circuit includes: a first region configured to connect two LEDs respectively disposed in the first and second LED groups and spaced apart from each other in a second direction; and a second region configured to connect two LEDs respectively disposed in the first and second LED groups and spaced apart from each other in a direction intersecting a first direction and the second direction.