An arthroscopic device for cutting a suture, comprising: - an elongated member which defines a longitudinal axis (X-X) and which includes a distal part provided with a through hole joining first and second openings (15, 16) respectively defined in radially opposed first and second sides (13, 14) of the member, and - an elongated body which is assembled with the member with a non-zero radial tolerance and which is axially moveably disposed with respect to the member between a load position, in which the body is axially away from the hole and thus keeps the hole free to receive at least one suture extending in length through the first and second openings (15, 16), and a cut position, in which the body axially covers in totality the first and second openings and cooperates with the hole for cutting the at least one suture, via an intermediate position in which, on the first side of the member, the first opening is kept at least partly free by the body, whereas, on the second side of the member, the second opening is axially covers in totality by the body, characterized in that the body is tubular and is moveably mounted around the member, and in that, when the tubular body is in the intermediate position with respect to the member, a radial gap, through which the at least one suture can slip, is defined on the second side of the member between a corresponding portion of a distal end of the member and a non-cutting portion of a distal end of the tubular body, so that, when both the tubular body is moved from the intermediate position to the cut position and the part of the at least one suture, passing through the gap, is tensioned, the gap is radially enlarged by a biasing action of the tensioned part of the at least one suture between the tubular body and the second side of the member, up to correspond to the tolerance, while another portion of the distal end of the tubular body, that is radially opposed to the non-cutting portion thereof, radially moves towards the first side of the member, up to cooperate without clearance with a distal portion of the first opening for cutting the at least one suture, a cutting edge being provided at said another portion of the distal end of the tubular body and/or a cutting edge being provided at said distal portion of the first opening. - an elongated member which defines a longitudinal axis (X-X) and which includes a distal part provided with a through hole joining first and second openings (15, 16) respectively defined in radially opposed first and second sides (13, 14) of the member, and - an elongated body which is assembled with the member with a non-zero radial tolerance and which is axially moveably disposed with respect to the member between a load position, in which the body is axially away from the hole and thus keeps the hole free to receive at least one suture extending in length through the first and second openings (15, 16), and a cut position, in which the body axially covers in totality the first and second openings and cooperates with the hole for cutting the at least one suture, via an intermediate position in which, on the first side of the member, the first opening is kept at least partly free by the body, whereas, on the second side of the member, the second opening is axially covers in totality by the body,