The invention discloses a rehabilitation chair for exercising hands and feet synchronously. The existing auxiliary equipment cannot switch back and forth between sitting exercise and standing exercise, and cannot exercise hands and feet synchronously. The invention comprises a chair body, a cushion board, a back board, a standing auxiliary mechanism, a driving mechanism, an arm stretching mechanism and a leg raising mechanism. The standing assistance mechanism includes an electric push rod, a sliding plate, a fixed plate, a first connecting plate, a second connecting plate, a first hinge set and a second hinge set. The drive mechanism includes a motor, an adjustable crankshaft, a first connecting rod, a second connecting rod, a third connecting rod, a first slider, a second slider and a third slider. The arm stretching mechanism includes a rope, a first pulley, a second pulley, a support column and a handle. The leg raising mechanism includes a rack, a cylindrical gear, a drive shaft, a driving bevel gear and two lifting components. The invention can exercise the patient's hands and feet at the same time, and the exercise efficiency is higher.