A traveling robot includes: a traveling body including a truck and a drive unit, the truck including front and rear wheels and a floor frame, the drive unit being configured to rotate the wheels; a support mechanism configured to raise or lower a holding tool configured to support a mounting plate; and a picking robot configured to load a cargo onto the mounting plate or unload the cargo from the mounting plate. The drive unit is mounted on the floor frame, and the floor frame includes a projecting portion projecting forward from a portion on which the drive unit is mounted. The support mechanism is attached to a front end portion of the projecting portion. The picking robot is provided at the projecting portion, is arranged between the support mechanism and the drive unit in a front-rear direction, and is arranged on or behind an imaginary vertical line passing through a front axle.