Filter device

A filter device comprising:

• a catheter having a housing space inside;
• a wire material extended along a longitudinal direction of the catheter in the housing space of the catheter;
• a distal end guide fixed to a distal end of the wire material, the distal end guide comprising:
• a fitting portion configured to be fitted to a distal end of the catheter so as to seal the housing space, and
• a guide portion projecting distally from the fitting portion;
• a filter capable of changing a state between an expanded state in which the filter is exposed to a distal end side of the catheter to be expanded to an outer side relative to an outer shape of the catheter, and a contracted state in which the filter is elastically contracted from the expanded state so as to be housed in the housing space;
• a slider that is attached to a distal end of the filter, the slider being rotatable about an axis of the wire material, and being movable along the wire material;
• a slide ring that is attached to a proximal end of the filter, the slide ring being rotatable about the axis of the wire material, and being prevented from moving in the longitudinal direction with respect to the wire material;
• a first stopper fixed to the wire material between the slider and slide ring, wherein the first stopper is disposed at a position where the slider abuts on or is brought close to the first stopper in the filter in the expanded state;
• and
• second stoppers individually fixed to the wire material on a distal end side and a proximal end side with respect to the slide ring.