Forming machine for ends of metal tubular elements, said machine comprising: - means for holding said tubular elements, - a support body to support a plurality of tools for forming ends (111, 112) of said tubular elements, which can be selectively aligned with said at least one tubular element in a working direction, said tools being associated with said support body and having an adjustable working depth, wherein said support body comprises a slider sliding on guides parallel to each other and to the working direction and attached to the support frame, and a tool-bearing table on which the tools are mounted integrally, said tool-bearing table being mobile in rotation or translation with respect to said slider; - means for driving said support body in order to move it in said working direction toward/away from said holding means, wherein said drive means comprise a rotating motor member able to supply a circular rotary movement with the same sense, and operatively connected to a motion conversion device configured to convert said circular rotary movement with the same sense into a linear alternating movement, alternately displacing said support body in the working direction, wherein said motion conversion device comprises a connecting rod-crank mechanism in which a first actuation element is configured as a crank rotating around an axis orthogonal to said working direction and in which a second actuation element is configured as a connecting rod pivoted on one side to said crank and on the opposite side to the rear of said support body; characterized in that said machine comprises at least one adjustment device attached to said support body and which can be selectively associated with said tools in order to adjust their distance from said holding means in an adjustment direction parallel to said working direction, each tool comprising a working head always facing said holding means, and an opposite adjustment tang always facing said at least one adjustment device which is provided with a motorized head, said adjustment tang of each tool and the motorized head being mobile with respect to each other so as to allow their reciprocal and temporary coupling. - means for holding said tubular elements, - a support body to support a plurality of tools for forming ends (111, 112) of said tubular elements, which can be selectively aligned with said at least one tubular element in a working direction, said tools being associated with said support body and having an adjustable working depth, wherein said support body comprises a slider sliding on guides parallel to each other and to the working direction and attached to the support frame, and a tool-bearing table on which the tools are mounted integrally, said tool-bearing table being mobile in rotation or translation with respect to said slider; - means for driving said support body in order to move it in said working direction toward/away from said holding means, wherein said drive means comprise a rotating motor member able to supply a circular rotary movement with the same sense, and operatively connected to a motion conversion device configured to convert said circular rotary movement with the same sense into a linear alternating movement, alternately displacing said support body in the working direction, wherein said motion conversion device comprises a connecting rod-crank mechanism in which a first actuation element is configured as a crank rotating around an axis orthogonal to said working direction and in which a second actuation element is configured as a connecting rod pivoted on one side to said crank and on the opposite side to the rear of said support body; wherein said drive means comprise a rotating motor member able to supply a circular rotary movement with the same sense, and operatively connected to a motion conversion device configured to convert said circular rotary movement with the same sense into a linear alternating movement, alternately displacing said support body in the working direction, wherein said motion conversion device comprises a connecting rod-crank mechanism in which a first actuation element is configured as a crank rotating around an axis orthogonal to said working direction and in which a second actuation element is configured as a connecting rod pivoted on one side to said crank and on the opposite side to the rear of said support body;