A tube cutter (1; 1.1) for cutting a round tube, comprising a main body (2; 2.1), a cutting device assigned to the main body (2; 2.1), and a rotary guide (4; 4.1) for the main body (2; 2.1), wherein the rotary guide (4; 4.1) is designed to rotatably accommodate the round tube in a receiving area, in order to enable a rotation of the tube cutter about the central axis of the round tube along its outer circumference, wherein the cutting device has a cutting part with a blade lying in a cutting plane and is configured such that, with a rotation of the tube cutter (1; 1.1) about the round tube, the blade executes a circumferential cut in the cutting plane, and wherein the tube cutter (1; 1.1) further comprises at least one forming element, which protrudes into the cutting plane or is positioned at least in the cutting plane and is configured such that, with a rotation of the tube cutter (1; 1.1) about the round tube, it acts in a forming manner on the outer circumference of the round tube, in order to form a bevel (131; 141) or another type of contour at an end of at least one of the tube parts (130, 140), created by the cut of the blade, by means of material displacement, wherein the at least one forming element is present separately from the cutting part, wherein the at least one forming element is a forming roller (22, 22'), wherein the tube cutter (1; 1.1) comprises at least one spring element, and the at least one forming element is configured to be moved out of a starting position lying in the receiving area for the round tube, against the force of the at least one spring element, such that the at least one forming element exerts a forming force due to the force of the spring element, when the round tube is accommodated in the receiving area; wherein the rotary guide comprises at least two support rollers (15, 15', 16, 16'), preferably parallel to each other, wherein the at least two support rollers (15, 15', 16, 16') are rotatably mounted on the main body (2; 2.1); characterized in that the at least two support rollers (15, 15', 16, 16') are mounted on biasing means, and said at least two support rollers (15, 15', 16, 16') are movable from respective starting positions (X and Y) and wherein each of said at least two support rollers (15, 15', 16, 16') extend into the receiving area, at least partially beyond an outer diameter of the at least one forming roller (22, 22') when in said starting positions (X and Y). wherein the at least one forming element is present separately from the cutting part, wherein the at least one forming element is a forming roller (22, 22'), wherein the tube cutter (1; 1.1) comprises at least one spring element, and the at least one forming element is configured to be moved out of a starting position lying in the receiving area for the round tube, against the force of the at least one spring element, such that the at least one forming element exerts a forming force due to the force of the spring element, when the round tube is accommodated in the receiving area; wherein the rotary guide comprises at least two support rollers (15, 15', 16, 16'), preferably parallel to each other, wherein the at least two support rollers (15, 15', 16, 16') are rotatably mounted on the main body (2; 2.1); characterized in that the at least two support rollers (15, 15', 16, 16') are mounted on biasing means, and said at least two support rollers (15, 15', 16, 16') are movable from respective starting positions (X and Y) and wherein each of said at least two support rollers (15, 15', 16, 16') extend into the receiving area, at least partially beyond an outer diameter of the at least one forming roller (22, 22') when in said starting positions (X and Y).