To provide a concrete configuration for suppressing sensor sensitivity so as to prevent a monitoring camera device from needlessly operating by a characteristic of an infrared sensor in particular concerning the monitoring camera device that has a video camera for converting an image formed through a lens into a video signal and the infrared sensor for passively detecting far- infrared radiation and starts the driving of the video camera when the infrared sensor detects far-infrared radiation that is equal to or more than a prescribed amount.

A filter 6 in which the transmittance of far-infrared radiation of a central part of the infrared sensor 4 in a detection direction is made smaller than the transmittance of parts other than the central part is disposed in front of the infrared sensor 4.