Turbine stage comprising at least one turbine rotor and multiple turbine blades arranged over the circumference of the turbine rotor, and also comprising at least one coupling element, wherein passage bores are formed in a first turbine blade and in a second turbine blade, which is adjacent to the first turbine blade, through which passage bores the coupling element extends, and wherein the coupling element mechanically couples the turbine blades (3', 3") to one another, characterized in that the coupling element - has a coupling sleeve with an internal thread and with a first abutment head which is formed on one end of the coupling sleeve, wherein the first abutment head has a diameter which is greater than the diameter of the passage bore through which the coupling element extends, and wherein the first abutment head is arranged on the outer side of the first turbine blade, - has a coupling pin with an external thread which is formed in a manner complementary to the internal thread of the coupling sleeve, and with a second abutment head which is formed on one end of the coupling pin, wherein the second abutment head has a diameter which is greater than the diameter of the passage bore through which the coupling element extends, and wherein the second abutment head is arranged on the outer side of the second turbine blade (3"), and wherein the coupling sleeve and the coupling pin are screwed to one another via the internal thread and the external thread. wherein passage bores are formed in a first turbine blade and in a second turbine blade, which is adjacent to the first turbine blade, through which passage bores the coupling element extends, and wherein the coupling element mechanically couples the turbine blades (3', 3") to one another, characterized in that the coupling element - has a coupling sleeve with an internal thread and with a first abutment head which is formed on one end of the coupling sleeve, wherein the first abutment head has a diameter which is greater than the diameter of the passage bore through which the coupling element extends, and wherein the first abutment head is arranged on the outer side of the first turbine blade, - has a coupling pin with an external thread which is formed in a manner complementary to the internal thread of the coupling sleeve, and with a second abutment head which is formed on one end of the coupling pin, wherein the second abutment head has a diameter which is greater than the diameter of the passage bore through which the coupling element extends, and wherein the second abutment head is arranged on the outer side of the second turbine blade (3"), and wherein the coupling sleeve and the coupling pin are screwed to one another via the internal thread and the external thread. - has a coupling sleeve with an internal thread and with a first abutment head which is formed on one end of the coupling sleeve, wherein the first abutment head has a diameter which is greater than the diameter of the passage bore through which the coupling element extends, and wherein the first abutment head is arranged on the outer side of the first turbine blade, - has a coupling pin with an external thread which is formed in a manner complementary to the internal thread of the coupling sleeve, and with a second abutment head which is formed on one end of the coupling pin, wherein the second abutment head has a diameter which is greater than the diameter of the passage bore through which the coupling element extends, and wherein the second abutment head is arranged on the outer side of the second turbine blade (3"), and wherein the coupling sleeve and the coupling pin are screwed to one another via the internal thread and the external thread.