A capture device for being applied to capture a target biological particle (T) from a specimen (S), comprising: two catchers (C) each including a base and a plurality of capture arms extending from the base and spaced apart from each other, wherein each of the capture arms has a free end portion configured to capture a target biological particle (T) and a supporting segment connected between the free end portion and the base , and wherein the supporting segment of each of the capture arms is arranged in a projection space defined by orthogonally projecting the free end portion along a height direction (H) onto the base ; and an adhesive layer gaplessly connected to the two catchers (C) so as to jointly define a chamber , wherein the capture arms of any one of the two catchers (C) face toward another one of the two catchers (C), and the capture arms of the two catchers (C) are arranged in the chamber , wherein the capture device has an opening that is spatially communicated between the chamber and an external space that is located outside of the capture device (D), and the chamber is configured to accommodate a specimen (S) through the opening , and wherein when the specimen (S) is accommodated in the chamber , and the target biological particle (T) is captured by two of the capture arms that are arranged adjacent to each other, the free end portion of any one of the two of the capture arms is attached with and carries the target biological particle (T) so as to bend the corresponding supporting segment to have an elastic force, and a part of the target biological particle (T) is trapped by the supporting segments of the two of the capture arms and is held by the elastic force. two catchers (C) each including a base and a plurality of capture arms extending from the base and spaced apart from each other, wherein each of the capture arms has a free end portion configured to capture a target biological particle (T) and a supporting segment connected between the free end portion and the base , and wherein the supporting segment of each of the capture arms is arranged in a projection space defined by orthogonally projecting the free end portion along a height direction (H) onto the base ; and an adhesive layer gaplessly connected to the two catchers (C) so as to jointly define a chamber , wherein the capture arms of any one of the two catchers (C) face toward another one of the two catchers (C), and the capture arms of the two catchers (C) are arranged in the chamber , wherein the capture device has an opening that is spatially communicated between the chamber and an external space that is located outside of the capture device (D), and the chamber is configured to accommodate a specimen (S) through the opening , and wherein when the specimen (S) is accommodated in the chamber , and the target biological particle (T) is captured by two of the capture arms that are arranged adjacent to each other, the free end portion of any one of the two of the capture arms is attached with and carries the target biological particle (T) so as to bend the corresponding supporting segment to have an elastic force, and a part of the target biological particle (T) is trapped by the supporting segments of the two of the capture arms and is held by the elastic force. <EOS>