Work machine

A work machine comprising:

• a travel structure;
• a swing structure swingably attached onto the travel structure;
• a multijoint work implement that is attached to the swing structure and that includes a boom, an arm, and a bucket;
• an operation device that outputs an action direction to each of the travel structure, the swing structure, the boom, the arm, and the bucket in response to an operator's operation;
• and
• a controller configured to execute region limiting control to forcibly raise the boom in such a manner that a position of a tip end of the work implement is kept on a target excavation surface and within a region above the target excavation surface when the operation device issues the action direction to the arm or the bucket, wherein
• the controller
• includes a target action determination section that determines which is selected, as a control mode over a raising speed of the boom at a time of executing the region limiting control, a first mode or a second mode specified by a raising speed lower than a raising speed of the first mode when the tip end of the work implement is located below the target excavation surface, and
• controls the raising speed of the boom during the region limiting control based on a result of determination by the target action determination section.