Work machine

A work machine that includes a track structure, an upper swing structure swingably attached on the track structure, a work device attached to the upper swing structure, two GNSS antennae installed on the upper swing structure, a receiver configured to calculate a position and an azimuth angle of the upper swing structure on a basis of satellite signals transmitted from a plurality of satellites and received by the two GNSS antennae, and a controller configured to calculate a position of a monitor point on a basis of the position and the azimuth angle of the upper swing structure calculated by the receiver, wherein

• the controller is configured to set, on a basis of installation positions of the two GNSS antennae on the work machine, a movable range of the work device, an inclination angle of the upper swing structure, and an azimuth angle of the upper swing structure, a range within which, when the two GNSS antennae individually receive satellite signals from the plurality of satellites, the work device possibly becomes an obstacle to the satellite signals as a mask range in a coordinate system set to a ground, and
• the receiver is configured to calculate a position and an azimuth angle of the upper swing structure on a basis of the satellite signals transmitted from remaining ones of the plurality of satellites, the remaining ones other than the satellites positioned within the mask range set by the controller.