Abstract: The mowing head (1) comprises: a body (3), which can be engaged to a motor shaft and defines a peripheral edge (3C); at least one member for anchorage (9) of a cutting line (F), with an elastically loaded eccentric oscillating element, which co-operates with a surface of contrast fixed to the body for anchoring said cutting line. The oscillating element (11) projects from the peripheral edge of the body of the mowing head with a knurled edge (11Z), which forms a gripping surface for causing oscillation of the oscillating element and release of the cutting line.