Abstract: The present invention provides the filter from the wire elements only, which certainly traps the thrombus and others, and easily visualizes from extra-corporeal and trapping system. The solution set forth in the present invention involves an expandable trapping filter, which is consist of plural knitted metallic wires with elastic or shape memory nature. The filter has two bundled parts in the distal and proximal ends of plural wires. When this filter expands at the intended tubular cavity of body part, each wire flips over to form parasol shape moving proximal bundled to distal bundled to catch a thrombus and others. Trapping system is deliverable from the distal edge of sheath which is interiorly loaded and is able to move in and out by the shaft movement along the penetrating shaft with the of proximal bundle immobilization.