PROBLEM TO BE SOLVED: To provide a sheet fixation member and a manufacturing method of the sheet fixation member which are capable of suppressing sheet degradation to improve weather resistance of the sheet, and making a manufacturing cost inexpensive.SOLUTION: A sheet fixation member 1 is formed in a long-size comprising: a bottom piece 2； side piece 3 standing from both ends of the bottom piece 2； and a dovetail groove 4 formed between the bottom piece 2 and the side piece 3, and fixes a sheet in the dovetail groove via a locking member 26, in which an irregularity is formed on a substrate surface of the bottom piece 2 and the side piece 3.
