<；P>；PROBLEM TO BE SOLVED: To provide a contact sensor device for fish, hardly allowing an aquatic organism such as seaweed or refuse to attach thereto or entangle therewith, and capable of preventing malfunction by preventing direct influence of the movement of seawater. <；P>；SOLUTION: The contact sensor device for the fish includes a line 22 having a mark part to be drawn by fish, and attached to a terminal part, a pressure sensor 18 for sensing the pressure, a pressurizing member 28 connected to the other terminal part of the line and for transmitting a tensile force added to the line to the action part 26 of the pressure sensor, and a protective cylinder body 20 for protecting the line. The pressure sensor and the pressurizing member are attached to the upper part of the protective cylinder, and the line is passed through the protective cylinder and derived from the lower end part, and has the mark part at the tip part. <；P>；COPYRIGHT: (C)2011,JPO&INPIT
