To form a transport carriage provided with a meandering correction function.

This in-line transport carriage equipped with a flexible wheel 3 and fixed wheels 4, 5 on the back surface side of a traveling platform is provided with a balance arm 7 whose middle part is supported by a spindle 6a on the bottom surface side of the traveling platform and which can rotate around its vertical axis. One end side of the balance arm 7 and the flexible wheel 3 are linked so as to interlock with each other, and are supported so as to move freely in a width direction of the traveling platform at the rear side of the traveling platform. A balance weight 8 is also provided, which involves self-restoring function to an original position by springs 10A, 10B extendingly-disposed on both sides, and the balance weight 8 and the other end side of the balance arm 7 are linked so as to interlock with each other.