To make it possible to properly position a work machine, and to output the position, according to traveling of a vehicle body when satellite navigation, inertial navigation, and a Kalman filter are used. This positioning detection device is provided with: a first acquisition unit for acquiring a satellite signal； a second acquisition unit for acquiring a detection signal from an inertia device； a third acquisition unit for acquiring forward movement of a vehicle body and turning of the vehicle body； a first computation unit for computing first positioning information, which is information about positioning in which the satellite signal is applied to satellite navigation； a second computation unit for computing second positioning information, which is information about positioning in which the detection signal is applied to inertial navigation； a third computation unit for computing third positioning information, which is information about positioning in which the first positioning information and the second positioning information are applied to a Kalman filter； and an output unit which, when forward movement of the vehicle body is acquired by the third acquisition unit, outputs the third positioning information computed by the third computation unit, and when turning of the vehicle body is acquired by the third acquisition unit, outputs the first positioning information and/or the second positioning information computed by the second computation unit.Selon l'invention, afin de permettre le positionnement correct d'une machine de travail, et afin de distribuer en sortie la position, selon le déplacement d'une carrosserie de véhicule lorsque la navigation par satellite, la navigation par inertie et un filtre de Kalman sont utilisés. Ce dispositif de détection de positionnement comporte : une première unité d'acquisition servant à acquérir un signal satellite ； une deuxième unité d'acquisition servant à acquérir un signal de détection provenant d'un dispositif d'inert
