A cutting element for a hedge trimmer, comprising: a cutting portion (2); an attaching portion (3), associated to the cutting portion (2) and predisposed to enable attachment of the cutting element to a rotating head (10) of a hedge-trimmer; the attaching portion (3) is hook-shaped and comprises an eyelet (31) on which a housing seating (32) is afforded for an attaching pin (12) solidly constrained to the rotating head (10), the housing seating (32) is provided with an opening (33) a maximum width of which is smaller than a diameter of the attaching pin (12); elastic means are predisposed to enable the opening (33) of the housing seating (32) to broaden up to taking on a width which is at least equal to the diameter of the attaching pin (12).