A line head (1) for a garden trimmer, which comprises a casing (2) rotating about an axis (X) and has a hollow body (2a) provided with a lid (2b). A cylindrical seat (3) for a reel (4) is defined inside the hollow body (2a), said reel being in turn provided with two grooves (4a, 4b). Each groove (4a, 4b) is designed to receive a respective line (5a, 5b) wound around the axis (X). The line head (1) is characterized in that it is further provided with a fitting equipment (60) of the reel (4) in the hollow body (2a). The fitting equipment (60) of the reel (4) comprises a cage-shaped main body (61) consisting of a ring (62) from which the centring pins (63) project. The centring pins (63) are designed to engage corresponding eyelets (55) formed on the periphery of the reel (4).
