Mobile crane

A mobile crane, comprising:

• a lower traveling body which includes a pair of crawlers each extending in forward and rearward directions and spaced apart from each other in leftward and rightward directions;
• an upper slewing body supported on the lower traveling body slewably about a slewing axis;
• a tiltable attachment including a boom tiltably supported on the upper slewing body;
• and
• a physical quantity detector, wherein
• the lower traveling body has a reaction force receiving part for receiving a reaction force from the ground at a position away from the slewing axis in a boom direction in a state where the pair of crawlers is in contact with the ground, the boom direction coinciding with a horizontal component of a direction in which the boom extends from the upper slewing body, and
• the physical quantity detector is configured to detect a physical quantity which changes in accordance with a change in the reaction force received from the ground by the reaction force receiving part,
• wherein the mobile crane further comprises:
• a notification device for notifying an operator of stability information concerning a stability of the mobile crane based on the physical quantity detected by the physical quantity detector;
• a stability determination section for determining the stability based on the physical quantity detected by the physical quantity detector;
• and
• a notification control section for outputting a notification instruction of notifying in the notifying device the operator of the stability information concerning the stability determined by the stability determination section.