Working machine

A working machine,

• in which an upperstructure including a front working device is mounted to be capable of swinging relative to an undercarriage, the working machine comprising a surrounding monitoring device that monitors surroundings,
• wherein the surrounding monitoring device has an information controller that:
• sets a working region by use of terrain data and work states received from sensors detecting the work states of the front working device of the working machine;
• calculates a proximity for each of the obstacles around the working machine by use of the working regions set and relative positions of each of obstacles and the working machine, the obstacles being detected by an obstacle sensor that detects obstacles around the working machine;
• and
• outputs a control instruction in accordance with the proximity,
• wherein the information controller sets, as the working region, interiors of reachable regions when the upperstructure swings under a condition where the front working device maintains the work state,
• in a case where the obstacle exists in one of the working regions, the information controller calculates the proximity in accordance with the relative positions,
• wherein the work state includes a position in a horizontal plane of a distal end of the front working device,
• the information controller further includes a reliability evaluation section to evaluate a degree of reliability of the terrain data, and
• the information controller sets, as a working region candidate, a region with the degree of reliability of less than a predetermined degree located inside a circumference in the horizontal plane, the circumference being centered at a swing center of the working machine and having, as a radius, a line segment from the swing center to a position of the distal end.