Disclosed herein is an implant-abutment, including: a fixture that is coupled to an alveolar bone and includes a female tapered part having a tapered shape on an inside thereof； an abutment, one side of which includes a male tapered part corresponding to a shape of the female tapered part so as to be interlocked and coupled to the female tapered part, and, the other side of which is coupled to a dental prosthesis； and an elastic part that is provided between the female tapered part and the male tapered part so as for the abutment to be movable between a locking position, in which the abutment stays coupled to the fixture and is inhibited from moving away from the alveolar bone, and a sinking position, in which the abutment moves and sinks towards the alveolar bone by an occlusal force of occluding teeth. According to embodiments of the present disclosure, provided is an easily retrievable implant-abutment device that is not only capable of maintaining a position in a state where an abutment is coupled to a fixture, but also capable of allowing a slight movement under a predetermined external force occurring due to an occlusal force of occluding teeth, and further in which, as necessary, the abutment is able to be separated from the fixture when an external force that is equal to or greater than a target coupling force for maintaining a coupled state therebetween is exerted.
