Pruning shears comprising - a cutting head with a spring-biased blade pivotally connected to a jaw about a pivot point, the jaw cooperating with the spring-biased blade to sever a workpiece received in a bight formed by the jaw; - a driving line connected at a first end of the driving line to the spring-biased blade at a distance from the pivot point; - an elongated body for supporting the cutting head at a first end of the elongated body; and - a handle connected movably to the elongated body; characterized in that - the pruning shears comprise a wheel having a frusto-conical shape connected rotatably to the handle so that the rotation axis of the wheel is transversal to the elongated body; - the wheel comprises a first end and a second end, the diameter of the wheel at the first end being smaller than the diameter of the wheel at the second end; - the wheel comprises a spiral groove arranged at the surface of the wheel for receiving the driving line into the spiral groove; - the driving line is arranged into the spiral groove and wound at least once around the wheel along the spiral groove at the first end of the wheel; - a second end of the driving line is attached to a second end of the elongated body; and - the driving line wound around the wheel is arranged to move towards the second end of the wheel as a result of unwinding of a part of the driving line from around the wheel and winding of another part of the driving line to around the wheel for decreasing the distance between the first end of the driving line and the second end of the driving line resulting in a movement of the spring-biased blade in relation to the jaw, when the handle is moved along the elongated body. - a cutting head with a spring-biased blade pivotally connected to a jaw about a pivot point, the jaw cooperating with the spring-biased blade to sever a workpiece received in a bight formed by the jaw; - a driving line connected at a first end of the driving line to the spring-biased blade at a distance from the pivot point; - an elongated body for supporting the cutting head at a first end of the elongated body; and - a handle connected movably to the elongated body; - the pruning shears comprise a wheel having a frusto-conical shape connected rotatably to the handle so that the rotation axis of the wheel is transversal to the elongated body; - the wheel comprises a first end and a second end, the diameter of the wheel at the first end being smaller than the diameter of the wheel at the second end; - the wheel comprises a spiral groove arranged at the surface of the wheel for receiving the driving line into the spiral groove; - the driving line is arranged into the spiral groove and wound at least once around the wheel along the spiral groove at the first end of the wheel; - a second end of the driving line is attached to a second end of the elongated body; and - the driving line wound around the wheel is arranged to move towards the second end of the wheel as a result of unwinding of a part of the driving line from around the wheel and winding of another part of the driving line to around the wheel for decreasing the distance between the first end of the driving line and the second end of the driving line resulting in a movement of the spring-biased blade in relation to the jaw, when the handle is moved along the elongated body.