A device (10; 10") for use in the treatment of hemorrhoids, said device comprising: an elongated tube-shaped element (12; 12") comprising a forward end (13; 13") and an aft end (14; 14"), said aft end is open such that the interior of the tube-shaped element is accessible via the aft end, said tube-shaped element is extending along a longitudinal axis L and comprises at least one opening (15; 15") formed between the forward and aft end; and an anal mucosa support device (20; 20") removably arranged within the tube-shape element, said support device comprises: a first and a second elongated part adjacently arranged to each other and extending substantially parallel to axis L, and at least two cavities (23, 24) for the anal mucosa arranged along a contact surface between the at least one first and second elongated part such that the cavities are formed by substantially identical half cavities in the first and adjacent second elongated part, said support device is, when arranged in the tube-shaped element, exposed in the opening, wherein at least one needle guide structure is formed in the elongated tube-shaped element and the anal mucosa support device, said at least one needle guide structure is configured to guide at least one needle (100; 1001"; 1002") during movement within the tube-shaped element from an extracted position in which the needle is arranged outside the opening in the elongated tube-shaped element across the at least two cavities in the anal mocusa support device to a position where the needle extends across the opening in the tube-shaped element, parallel to the longitudinal axis L, wherein the at least one needle guide structure comprises at least one needle passage (25; 251"; 252") arranged in the opening in the elongated tube-shaped element to guide the at least one needle during movement from the extracted position to the position where the needle extends across the opening in the tube-shaped element, and in that the at least one needle passage is formed in the contact surface between the first and second elongated part such that the at least one needle passage is opened when the first and second elongated part are separated from each other. an elongated tube-shaped element (12; 12") comprising a forward end (13; 13") and an aft end (14; 14"), said aft end is open such that the interior of the tube-shaped element is accessible via the aft end, said tube-shaped element is extending along a longitudinal axis L and comprises at least one opening (15; 15") formed between the forward and aft end; and an anal mucosa support device (20; 20") removably arranged within the tube-shape element, said support device comprises: a first and a second elongated part adjacently arranged to each other and extending substantially parallel to axis L, and at least two cavities (23, 24) for the anal mucosa arranged along a contact surface between the at least one first and second elongated part such that the cavities are formed by substantially identical half cavities in the first and adjacent second elongated part, said support device is, when arranged in the tube-shaped element, exposed in the opening, a first and a second elongated part adjacently arranged to each other and extending substantially parallel to axis L, and at least two cavities (23, 24) for the anal mucosa arranged along a contact surface between the at least one first and second elongated part such that the cavities are formed by substantially identical half cavities in the first and adjacent second elongated part, said support device is, when arranged in the tube-shaped element, exposed in the opening, wherein at least one needle guide structure is formed in the elongated tube-shaped element and the anal mucosa support device, said at least one needle guide structure is configured to guide at least one needle (100; 1001"; 1002") during movement within the tube-shaped element from an extracted position in which the needle is arranged outside the opening in the elongated tube-shaped element across the at least two cavities in the anal mocusa support device to a position where the needle extends across the opening in the tube-shaped element, parallel to the longitudinal axis L, wherein the at least one needle guide structure comprises at least one needle passage (25; 251"; 252") arranged in the opening in the elongated tube-shaped element to guide the at least one needle during movement from the extracted position to the position where the needle extends across the opening in the tube-shaped element, and in that the at least one needle passage is formed in the contact surface between the first and second elongated part such that the at least one needle passage is opened when the first and second elongated part are separated from each other.