The present invention relates to an abutment for an implant, and more specifically, to an abutment for an implant capable of improving sealing with a fixture through the formation of a groove in a close adhesion portion. The abutment for an implant according to one aspect of the prevent invention comprises a screw portion, a close adhesion portion, and a head portion. The thread of a screw is formed in the screw portion so as to allow the abutment to be inserted into a fixture to be coupled by a screw. The close adhesion portion is tapered at the upper portion of the screw portion so as to be inserted into a tape portion of the fixture to come in contact with the same. The head portion is formed at the upper portion of the close adhesion portion to enable coupling of a prosthesis. Particularly, in this case, the close adhesion portion has a plurality of grooves, which are formed along the circumference direction in a region in contact with the tape portion of the fixture, to reinforce the close adhesion with the tape portion of the fixture. According to the present invention, the local area of the close adhesion portion is modified into grooves in case of fastening with the fixture by providing the abutment having grooves formed in the close adhesion portion. Therefore, sealing effects can be improved by increasing close adhesion between the abutment and the fixture.La présente invention porte sur une butée pour un implant et, de manière plus spécifique, sur une butée pour un implant apte à améliorer létanchéité avec une fixation par la formation dune rainure dans une partie dadhésion étroite. La butée pour un implant, selon un aspect de la présente invention, comprend une partie vis, une partie dadhésion étroite et une partie tête. Le filet dune vis est formé dans la partie vis de façon à permettre à la butée dêtre insérée dans une fixation à coupler au moyen dune vis. La partie dadhésion étroite est effilée au niveau de la partie supérieure de la partie vis de faç
