Patent ID: 7204518

Claim:
A construction machine in which a frame of a crawler-type traveling body comprises a box-shaped center frame, a pair of truck frames disposed on an outside of opposite side portions of said center frame, and a hollow connecting member for connecting said center frame to said truck frames, wherein at least one of respective height differences between an upper face or a lower face of said center frame at a joining portion between said center frame and said connecting member and an upper face or a lower face of a center joining portion of said connecting member is set respectively at a dimension that is approximately equal to or less than a thickness of an upper face plate or a lower face plate of said center frame, and the upper face plate of said center frame and the upper face plate of said center joining portion of said connecting member, or the lower face plate of said center frame and the lower face plate of said center joining portion of said connecting member, in which a height difference is set to the dimension, are formed in parallel to each other.