To provide a low air-pressure inspecting device for tyre with which a driver can easily measure whether an air pressure of an automobile tyre is within a reference range.

The low air-pressure inspecting device for automobile tyre is provided with a base (10), an alarming device (20), and two parallel, separated, elastic pipes (11). The base (10) is firmly installed on the ground. The alarming device (20), provided on one end of the base, has a first switch (21), a second switch (22), and an alarm circuit (23). The parallel separated pipes (11) has, respectively, a first closed end, and a second end connected to either the first switch or the second switch. When the two pipes are pressurized at the same time, the first switch (21) and the second switch (22) close the alarm circuit to issue an alarm.