To provide a movable type sensing device that is installed in facilities when abnormality needs to be sensed and withdrawn from the facilities when abnormality need not be sensed.

A movable type sensing device 1 which senses abnormality in facilities includes support means 2 which can be installed in the facilities and is movable, a sensor 15 which is supported by the support means 2 and senses abnormality, and a receiver 20 which receives an abnormality signal sensed by the sensor 15. The support means 2 is configured to extend and contract. The movable type sensing device is installed in the facilities in a nighttime etc., when abnormality needs to be sensed and withdrawn from the facilities in a daytime etc., when abnormality needs to be sensed.