A directly-attaching type rotary cutter for a brush cutter, comprising: a head main body (1; 11) including: a case (1-1; 11-1); and a cover (1-2; 11-2) which covers the case (1-1; 11-1), the case (1-1; 11-1) and the cover (1-2; 11-2) defining a cord guide hole; and a pressure member (2; 12) incorporated within the head main body (1; 11) and adapted to project from the head main body (1; 11) and to be rotated when being pushed inwardly of the head main body (1; 11), the pressure member (2; 12) including: a cord inserting guide hole (2-2; 12-2) formed to radially penetrate through the pressure member (2; 12); and a concave-convex fitting mechanism configured to be fitted with the head main body (1; 11), and wherein the pressure member (2; 12) is operable between: a first state in which the cord inserting guide hole (2-2; 12-2)of the pressure member (2; 12) is aligned with the cord guide hole of the head main body (1; 11) so that a cutting cord is insertable into the cord inserting guide hole (2-2; 12-2) and the cord guide hole; and a second state in which the pressure member (2; 12) is pushed inwardly of the head main body (1; 11) from the first state; characterized in that the pressure member (2; 12) is further operable in a third state in which the pressure member (2; 12) is rotated with respect to the head main body (1; 11) from the second state so that the inserted cutting cord is made into a bent state, and wherein the concave convex fitting mechanism of the pressure member (2; 12) fits with the head main body (1; 11) when the pressure member (2; 12) is in the third state so that a rotation of the pressure member (2; 12) is inhibited and the inserted cutting cord is held in the bent state. a head main body (1; 11) including: a case (1-1; 11-1); and a cover (1-2; 11-2) which covers the case (1-1; 11-1), the case (1-1; 11-1) and the cover (1-2; 11-2) defining a cord guide hole; and a case (1-1; 11-1); and a cover (1-2; 11-2) which covers the case (1-1; 11-1), the case (1-1; 11-1) and the cover (1-2; 11-2) defining a cord guide hole; and a pressure member (2; 12) incorporated within the head main body (1; 11) and adapted to project from the head main body (1; 11) and to be rotated when being pushed inwardly of the head main body (1; 11), the pressure member (2; 12) including: a cord inserting guide hole (2-2; 12-2) formed to radially penetrate through the pressure member (2; 12); and a concave-convex fitting mechanism configured to be fitted with the head main body (1; 11), and a cord inserting guide hole (2-2; 12-2) formed to radially penetrate through the pressure member (2; 12); and a concave-convex fitting mechanism configured to be fitted with the head main body (1; 11), and wherein the pressure member (2; 12) is operable between: a first state in which the cord inserting guide hole (2-2; 12-2)of the pressure member (2; 12) is aligned with the cord guide hole of the head main body (1; 11) so that a cutting cord is insertable into the cord inserting guide hole (2-2; 12-2) and the cord guide hole; and a second state in which the pressure member (2; 12) is pushed inwardly of the head main body (1; 11) from the first state; characterized in that the pressure member (2; 12) is further operable in a third state in which the pressure member (2; 12) is rotated with respect to the head main body (1; 11) from the second state so that the inserted cutting cord is made into a bent state, and a first state in which the cord inserting guide hole (2-2; 12-2)of the pressure member (2; 12) is aligned with the cord guide hole of the head main body (1; 11) so that a cutting cord is insertable into the cord inserting guide hole (2-2; 12-2) and the cord guide hole; and a second state in which the pressure member (2; 12) is pushed inwardly of the head main body (1; 11) from the first state; characterized in that the pressure member (2; 12) is further operable in a third state in which the pressure member (2; 12) is rotated with respect to the head main body (1; 11) from the second state so that the inserted cutting cord is made into a bent state, and wherein the concave convex fitting mechanism of the pressure member (2; 12) fits with the head main body (1; 11) when the pressure member (2; 12) is in the third state so that a rotation of the pressure member (2; 12) is inhibited and the inserted cutting cord is held in the bent state.