Treatment tool and treatment system

A treatment tool comprising:

• a first jaw including a first holding surface;
• a second jaw including a second holding surface to hold living tissue with the first holding surface;
• a first wiring pattern that is provided on the first holding surface and that includes a first heat-generating portion where a resistance value per unit length in a longitudinal direction connecting a distal end and a proximal end of the first jaw is higher than resistance values of other areas, the first heat-generating portion being configured to generate heat with an applied current;
• a first heating plate that is disposed to face the first holding surface, the first heating plate being configured to transmit heat from the first wiring pattern to the living tissue by bringing into contact with the living tissue;
• a second wiring pattern that is provided on the second holding surface and that includes a second heat-generating portion where a resistance value per unit length in a longitudinal direction connecting a distal end and a proximal end of the second jaw is higher than resistance values of other areas, the second heat-generating portion being configured to generate heat with an applied current;
• and
• a second heating plate that is disposed to face the second holding surface, the second heating plate being configured to transmit heat from the second wiring pattern to the living tissue by bringing into contact with the living tissue, wherein
• the first heat-generating portion is provided at a first area when the first holding surface is divided into two areas where the first area and a second area are arranged parallel in the longitudinal direction connecting the distal end and the proximal end of the first jaw, and
• the second heat-generating portion is provided at a second projection area when the second holding surface is divided into two areas where a first projection area onto which the first area is projected and the second projection area onto which the second area is projected in a closed state where the first holding surface and the second holding surface are faced each other.