The invention relates to a patient transferring device. The patient transferring device comprises a base, a supporting frame, wheels, slide rails, slide seats, translation mechanisms, a head supporting board, a shoulder supporting board, a waist supporting board, a buttock supporting board, a leg supporting plate, a plurality of lifting ropes, a first lifting seat, a second lifting seat, a third lifting seat, a fourth lifting seat, a fifth lifting seat, a first lifting mechanism, a second lifting mechanism, a third lifting mechanism, a fourth lifting mechanism and a fifth lifting mechanism. When a patient is transferred by the aid of the patient transferring device, corresponding parts of the patient are gently supported, the supporting boards are cushioned under the corresponding parts of the patient or each supporting board is drawn out, a detachable structure is connected or disconnected, and lifting and laying of the patient are both finished mechanically, so that the patient transferring device is pretty convenient to use; transferring of the patient is realized mechanically, the patient can keep a flat state, and higher safety and reliability are achieved; in addition, mechanically transferring patients can greatly relieve work intensity for nurses to alleviate fatigues for the nurses, the nurses are enabled to have sufficient energy to put into work, and the patient transferring device can be normally operated only by one nurse, and accordingly manpower is reduced.