The invention discloses a mechanical hand, and belongs to the technical field of mechanical hands, and aims to solve the problem that an existing mechanical hand is low in dismounting efficiency. The mechanical hand comprises a pedestal; and a circuit board I is arranged on the pedestal. The mechanical hand is characterized in that a through hole I is formed in the circuit board I; a cylindrical connecting column with a through hole III is formed between the pedestal and the circuit board I; the two ends of the connecting column separately abut against the circuit board I and the pedestal I; and the mechanical hand comprises a bolt which sequentially passes through the through hole I of the circuit board I and the through hole III of the connecting column, and is fixedly arranged on the pedestal. According to the mechanical hand disclosed by the invention, the connecting column with the through hole III is formed between the circuit board I and the pedestal, and the circuit board I is fixedly arranged on the pedestal in a once threaded connection mode, so that dismounting of the mechanical hand is relatively convenient.