The invention discloses a press key structure comprising a key cap, a rigid circuit board, at least one coupling member, a micro-switch and a support unit, wherein the key cap is provided with at least one connecting part, the rigid circuit board has an accommodating space, the at least one coupling member is arranged on the rigid circuit board and projects toward the key cap, the micro-switch is positioned below the key cap and is partially accommodated in the accommodating space, the micro-switch is electrically connected to the rigid circuit board, the support unit is coupled to the at least one connecting part and the at least one coupling member, and therefore the key cap can be supported to move relative to the rigid circuit board to trigger the micro-switch. According to the press key structure, through arrangement of the micro-switch, comfortable pressing touch can be realized, the micro-switch is integrated with the rigid circuit board which provides a needed electric path, and therefore feasibility and convenience of individual press key maintenance can be improved. According to the press key structure, the coupling member is integrated with the rigid circuit board, the circuit board is enabled to have a function of a coupling key cap or the supporting unit, no extra base plate is needed, and the number of elements of the press key structure is reduced.