A trimmer head in which a cutting line can be loaded to a spool includes a housing connectable to a driving shaft. A line outlet is disposed in the housing and the spool is connected to the housing. In a line winding mode, the spool includes a position where an end of a line leading channel is aligned with the line outlet and a cutting line may enter the line leading channel and will be in clearance fit with the line leading channel. When the spool is rotated with respect to the housing, a portion of the cutting line in the line leading channel is pressed tightly therein, and the portion of the cutting line extending from the line leading channel can be pulled toward the spool.
