A chopsticks style mouse used as an input device of a computer, comprising: a first stick portion; a second stick portion; wherein the first stick portion and the second stick portion are formed in a cylindrical shape or in a cylindrical cone shape; and a bridge portion being formed of an elastic body, the bridge portion being provided obliquely upward on one surface of the first stick portion to support the second stick portion, the bridge portion has one end portion being connected to the firs stick portion and a second end portion being connected to the second stick portion so that one end of the second stick portion is separated from and adjacent to the first stick portion and the other end of the second stick portion is separated more widely from the first stick portion than the one end of the second stick portion; wherein the first stick portion has a first end in which an optical sensor portion is formed, wherein the optical sensor portion is configured to contact a mouse pad and output light to the mouse pad, and to receive the reflected output light, and generate a cursor on a computer screen; and the chopsticks style mouse further comprises: a contact switch portion including a case module (410, the case module having a surface fixed to the first stick portion and being positioned between the first stick portion and the second stick portion, and the contact switch portion further including a first button portion protruding from the case module toward the second stick portion, wherein the first button portion is pressed by the second stick portion when a pressure is applied to the second stick portion toward the first stick portion, and the first button portion is returned to a non-press state by dint of the elastic force of the bridge portion between the first stick portion and the second stick portion when the press to the second stick portion toward the first stick portion is removed. a first stick portion; a second stick portion; wherein the first stick portion and the second stick portion are formed in a cylindrical shape or in a cylindrical cone shape; and a bridge portion being formed of an elastic body, the bridge portion being provided obliquely upward on one surface of the first stick portion to support the second stick portion, the bridge portion has one end portion being connected to the firs stick portion and a second end portion being connected to the second stick portion so that one end of the second stick portion is separated from and adjacent to the first stick portion and the other end of the second stick portion is separated more widely from the first stick portion than the one end of the second stick portion; wherein the first stick portion has a first end in which an optical sensor portion is formed, wherein the optical sensor portion is configured to contact a mouse pad and output light to the mouse pad, and to receive the reflected output light, and generate a cursor on a computer screen; and the chopsticks style mouse further comprises: a contact switch portion including a case module (410, the case module having a surface fixed to the first stick portion and being positioned between the first stick portion and the second stick portion, and the contact switch portion further including a first button portion protruding from the case module toward the second stick portion, wherein the first button portion is pressed by the second stick portion when a pressure is applied to the second stick portion toward the first stick portion, and the first button portion is returned to a non-press state by dint of the elastic force of the bridge portion between the first stick portion and the second stick portion when the press to the second stick portion toward the first stick portion is removed. a contact switch portion including a case module (410, the case module having a surface fixed to the first stick portion and being positioned between the first stick portion and the second stick portion, and the contact switch portion further including a first button portion protruding from the case module toward the second stick portion, wherein the first button portion is pressed by the second stick portion when a pressure is applied to the second stick portion toward the first stick portion, and the first button portion is returned to a non-press state by dint of the elastic force of the bridge portion between the first stick portion and the second stick portion when the press to the second stick portion toward the first stick portion is removed.