To provide a vehicular indicator capable of red-flag to the outside of a vehicle by hooking inside of the vehicle immediately when needed.

When a stopping vehicle is used for a road construction, when an accident is prevented by notifying a preceding accident car, and when a vehicle stops in an emergency case, this indicator can be immediately hooked inside of the vehicle, or hooked inside of the vehicle according to a need while the vehicle is traveling. Lights are emitted from a light emitting diode 6 by inserting a power plug 11 at a tip of a power supply line 10 in a terminal of a cigarette lighter. Since a sucking disk 17 is mounted to a hinge 14 rotatably mounted to a frame body 3 of a housing 2, the sucking disk 17 can be sucked corresponding to a curved face of a glass window of the vehicle, so as to hook to a best form, in which a front face of a vehicular indicator 1 can be visually recognized from outside of the vehicle. A light reflection face 12 is formed on a cover 5, so as to improve visibility.