PURPOSE: To provide a display device for the disconnection of a warning lamp to make a driver instantly and easily confirm the serious disconnected state of an abnormality alarming lamp of a vehicle through the lighting and nonlighting of the lamp by newly providing the display device for the disconnection of an alarm lamp with another alarm lamp for judging the disconnection of the lamp.

CONSTITUTION: A terminal on one side is directly connected to a power source, and a terminal on the other side is connected to the rectifying device D1 of the first alarm lamp earthed through the first switch SW1 turned on when the rectifying device D1 and an ignition switch are turned on, and the terminal on one side is connected to the power source through the ignition switch. Voltage at the connecting point of rectifying devices D2-D7 connected to the terminal on the other side of plurality of the second alarm lamps L2-L7 earthed through the second switches SW2-SW7 to turn on the terminal on the other side at the time of the occurrence of abnormality is detected, and the detected voltage is compared with previously set up voltage at the time when all the lamps are normal, and when they do not mutually coincide, a signal for abnormality is issued to turn on or off the third alarm lamp WL for displaying the disconnection of the first and the second alarm lamps L1-L7.