A capacitive sensitive key structure includes a key, support component, fixing pad, substrate and conductive portion. The key includes a key body and a connection wall which encloses a receiving space. The support component is disposed in the receiving space and includes a body, conical wall, buffering space, and extending pad connected to the conical wall. The body abuts against the key body. The conductive portion is disposed at the bottom of the body and inside the buffering space. The substrate is connected to the fixing pad and has thereon a circuit unit and a sensing layer. The substrate is coated with an insulating layer which covers the sensing layer. When the key body is pressed to press against the support component, electrostatic changes occur because of changes in the distance between the conductive portion and the sensing layer; hence, the circuit unit sends electrical signals for driving electronic apparatuses.