Signaler detection device and signaler detection method

A signaler detection device 100 is provided with: a signaler position estimation unit 13 for estimating the relative position of a signaler to a vehicle 5 on the basis of map information D02 which includes position information about signalers that exist around the vehicle 5, and the position of the vehicle 5 itself; a first detection area setting unit 21 for setting a first detection area on an image for each signaler anticipated to exist on an image acquired by an imaging unit 11 from the relative position of the signaler; a second detection area setting unit 14 for setting, on the image, if a plurality of signalers are anticipated to exist on the image, a second detection area that includes the anticipated plurality of signalers; a third detection area setting unit 23 for setting a third detection area by correcting the first detection area on the basis of lamp candidates of signalers detected from the second detection area; and a signaler detection unit 17 for detecting a signaler from the third detection area.