The present invention relates to a construction machine having an operator's cabin whose cabin structure which is made reinforced serves the protection of the operator, with the operator's cabin being supported via a base plate at an operator's cab frame at the machine side. In accordance with the invention, the stiffness of the cabin structure is larger than that of the base plate and/or of the operator's cab frame at least with respect to a lateral force engagement so that in a load case first the base plate and/or the operator's cab frame are deformed.