A tool for manipulating tissue includes a penetration needle adapted to be stuck into a body cavity of a patient. A pulling device is insertable into a hollow portion of the penetration needle so as to be positioned in the body cavity of the patient when the penetration needle is stuck therein. The pulling device is adapted to pull tissue in the body cavity and the penetration needle is adapted to be removed from the body cavity after the pulling device is positioned therein. A manipulating device having a hollow portion through which the pulling device can be passed is adapted to be guided over the pulling device to be inserted into the body cavity of the patient after the penetration needle is removed therefrom. The manipulating device is adapted to be positionally fixed relative to the pulling device and to be operable together with the pulling device to move the pulled tissue in a desired direction and to hold the pulled tissue at a desired position.