A maintenance support system comprising: a terminal including an imaging device; characterized in that said terminal is a wearable terminal and worn by a maintenance worker; and by a first identifying device configured to identify a predetermined three-dimensional area including a maintenance target with reference to a predetermined reference point in a captured image acquired by capturing an image of the maintenance target with the imaging device in an initial state; a second identifying device configured to identify a position of the imaging device in the initial state with respect to the reference point; a third identifying device configured to identify a change of position from the initial state of the imaging device in a post-movement state in which the wearable terminal has moved; a fourth identifying device configured to identify a position of the reference point with reference to the imaging device in the post-movement state, based on the position of the imaging device in the initial state with respect to the reference point identified by the second identifying device and on the change of position from the initial state of the imaging device in the post-movement state identified by the third identifying device, and configured to identify an effective pixel area corresponding to the three-dimensional area in a captured image acquired by the imaging device in the post-movement state, based on the identified position of the reference point and on the three-dimensional area identified by the first identifying device; a processed-image generating device configured to generate a processed image in which a mask pixel area excluding the effective pixel area identified by the fourth identifying device is made invisible for the captured image acquired by the imaging device in the post-movement state; and a communication device configured to transmit the processed image generated by the processed-image generating device to a support terminal operated by a maintenance supporter. a terminal including an imaging device; characterized in that said terminal is a wearable terminal and worn by a maintenance worker; and by a first identifying device configured to identify a predetermined three-dimensional area including a maintenance target with reference to a predetermined reference point in a captured image acquired by capturing an image of the maintenance target with the imaging device in an initial state; a second identifying device configured to identify a position of the imaging device in the initial state with respect to the reference point; a third identifying device configured to identify a change of position from the initial state of the imaging device in a post-movement state in which the wearable terminal has moved; a fourth identifying device configured to identify a position of the reference point with reference to the imaging device in the post-movement state, based on the position of the imaging device in the initial state with respect to the reference point identified by the second identifying device and on the change of position from the initial state of the imaging device in the post-movement state identified by the third identifying device, and configured to identify an effective pixel area corresponding to the three-dimensional area in a captured image acquired by the imaging device in the post-movement state, based on the identified position of the reference point and on the three-dimensional area identified by the first identifying device; a processed-image generating device configured to generate a processed image in which a mask pixel area excluding the effective pixel area identified by the fourth identifying device is made invisible for the captured image acquired by the imaging device in the post-movement state; and a communication device configured to transmit the processed image generated by the processed-image generating device to a support terminal operated by a maintenance supporter.