An intra-vessel transcatheter filter device designed to capture and remove emboli, thus preventing distal embolization, comprising: • a tubular filter comprising a flexible porous material and defined by a distal element and a proximal element, namely a main body and a funnel; i. said main body having a length adapted to extend within a suitable vessel zone; said main body comprising: a) a distal end that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end; ii. said funnel forming an extension of said main body, with the funnel base located at said proximal end. • a support structure assembly comprising: i. a supporting catheter extending within said main body, ii. one radially expandable distal structure fixed to said distal end, iii. one radially expandable proximal structure positioned in correspondence of said proximal end, characterized in that the supporting catheter is joined to said distal structure and said proximal structure. • a tubular filter comprising a flexible porous material and defined by a distal element and a proximal element, namely a main body and a funnel; i. said main body having a length adapted to extend within a suitable vessel zone; said main body comprising: a) a distal end that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end; ii. said funnel forming an extension of said main body, with the funnel base located at said proximal end. i. said main body having a length adapted to extend within a suitable vessel zone; said main body comprising: a) a distal end that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end; a) a distal end that is adapted to be radially coupled with said zone and hermetically sealed to it when the device is in an active configuration, said distal end being provided of selectively actionable closure means so that said distal end is designed to be open when the device is in an active configuration and closed before the device retraction, b) a proximal end; ii. said funnel forming an extension of said main body, with the funnel base located at said proximal end. • a support structure assembly comprising: i. a supporting catheter extending within said main body, ii. one radially expandable distal structure fixed to said distal end, iii. one radially expandable proximal structure positioned in correspondence of said proximal end, i. a supporting catheter extending within said main body, ii. one radially expandable distal structure fixed to said distal end, iii. one radially expandable proximal structure positioned in correspondence of said proximal end,