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A cutting device for surgical threads comprising: - a guide body having a tubular shape extending along a longitudinal axis, having an internal axial cavity defining a housing portion adapted to receive a surgical thread, said guide body comprising a first end, which is at least partially open to allow insertion of the surgical thread and has a first cutting area defined by an abutment surface oriented transversely to the longitudinal extension axis of the guide body; - a cutting body comprising a central portion extending along a longitudinal axis and adapted to be inserted in said housing portion; said central portion having a section transverse to said longitudinal axis such as to define, when coupled in said housing portion, a passage channel, extending parallel to the longitudinal axis, for housing said surgical thread, and comprising a first end equipped with a second cutting area defined by an abutment surface oriented transversely to the longitudinal extension axis of the cutting body; said second cutting area abutting against the first cutting area when said cutting body is at least partially received in the housing area; - an actuator element, capable of causing said cutting body to rotate relative to said guide body about said longitudinal extension axis between a first position, in which the abutment surfaces (122', 232') of said first and said second cutting areas, respectively, are arranged relative to each other so as to identify a passageway at the first ends (120', 230') of said housing area and said cutting area, respectively, communicating with said internal axial cavity, and a second position, in which said passageway is at least partially obstructed by the counter-rotating movement of said abutment surfaces (122', 232'), which intersect tangentially so as to cut the surgical thread therebetween, characterized in that said abutment surface of the second cutting area has an angle comprised between 150° and 170° to define a housing zone for said surgical thread; and in that the guide body has a coupling area adapted to provide an axially stable connection between the guide body and the cutting body; a second end (230") of said cutting body comprising a radial projection, wherein said coupling area comprises an annular groove formed at a second end (120") of said guide body, adapted to receive the corresponding radial projection, and the guide body has a notch at the second end (120") for inserting said projection in said groove so as to allow mutual engagement, correct and stable relative axial positioning, and relative rotation between said cutting body and the guide body. - a guide body having a tubular shape extending along a longitudinal axis, having an internal axial cavity defining a housing portion adapted to receive a surgical thread, said guide body comprising a first end, which is at least partially open to allow insertion of the surgical thread and has a first cutting area defined by an abutment surface oriented transversely to the longitudinal extension axis of the guide body; - a cutting body comprising a central portion extending along a longitudinal axis and adapted to be inserted in said housing portion; said central portion having a section transverse to said longitudinal axis such as to define, when coupled in said housing portion, a passage channel, extending parallel to the longitudinal axis, for housing said surgical thread, and comprising a first end equipped with a second cutting area defined by an abutment surface oriented transversely to the longitudinal extension axis of the cutting body; said second cutting area abutting against the first cutting area when said cutting body is at least partially received in the housing area; - an actuator element, capable of causing said cutting body to rotate relative to said guide body about said longitudinal extension axis between a first position, in which the abutment surfaces (122', 232') of said first and said second cutting areas, respectively, are arranged relative to each other so as to identify a passageway at the first ends (120', 230') of said housing area and said cutting area, respectively, communicating with said internal axial cavity, and a second position, in which said passageway is at least partially obstructed by the counter-rotating movement of said abutment surfaces (122', 232'), which intersect tangentially so as to cut the surgical thread therebetween, characterized in that said abutment surface of the second cutting area has an angle comprised between 150° and 170° to define a housing zone for said surgical thread; and in that the guide body has a coupling area adapted to provide an axially stable connection between the guide body and the cutting body; a second end (230") of said cutting body comprising a radial projection, wherein said coupling area comprises an annular groove formed at a second end (120") of said guide body, adapted to receive the corresponding radial projection, and the guide body has a notch at the second end (120") for inserting said projection in said groove so as to allow mutual engagement, correct and stable relative axial positioning, and relative rotation between said cutting body and the guide body.