Work machine

A work machine comprising:

• a boom;
• a boom cylinder 51 including a bottom chamber and a head chamber;
• a boom pump 12 including a suction port and a discharge port;
• a hydraulic oil tank;
• a boom operation valve including a pump port connected to the discharge port via a pump line, a bottom port connected to the bottom chamber via a bottom line, a head port connected to the head chamber via a head line, a tank port connected to the hydraulic oil tank via a tank line, and a regenerative port connected to the suction port via a regenerative line;
• an accumulator connected to the regenerative line via an accumulator line;
• an accumulator switching valve that adjusts a flow rate of hydraulic oil in the accumulator line;
• and
• a controller that controls the boom operation valve and the accumulator switching valve so that hydraulic oil emitted from the bottom chamber is distributed to each of the suction port and the accumulator in a lowering operation of the boom.