Small hydraulic excavator

A small hydraulic excavator comprising:

• an undercarriage;
• an upperstructure that is swingably disposed on the undercarriage and is configured such that a rear end of the upperstructure is within a body width range of the undercarriage while the upperstructure swings;
• a main frame of the upperstructure that has a pair of longitudinal board members juxtaposed along a longitudinal direction of the upperstructure;
• a working device that is vertically rotatably supported in front of a center of swing of the upperstructure and includes a boom and a boom cylinder;
• a counterweight that is disposed on a rear end side of the upperstructure;
• a valve block that is disposed on a one side of the pair of longitudinal board members of the main frame and includes at least a plurality of directional control valves;
• and an accumulator that accommodates and recovers potential energy and hydraulic energy used by at least one of drives of the undercarriage, the upperstructure, and the working device, the small hydraulic excavator in which a frame continuous with a floor seat provided on the upperstructure and having an operator seat and the counterweight serve as a partition wall that forms an engine room,
• wherein the accumulator is disposed between the valve block and the one side of the pair of the longitudinal board members of the main frame along the one side of the pair of the longitudinal board members, and a pipe connected to the accumulator and the valve block is disposed closer to the accumulator and the valve block.