The present invention relates to the utilization of peptide analogues of thymulin that are inactive relative to the immune system, not comprising zinc and having anti-pain activity, for manufacturing a medicine for the treatment of pain. The filter device spans the entire span between an outlet pipe and a valve wall. A dummy island is formed in an area between the circuit element area and the stationary electrode layer area. The use of reflective elements can reduce the depth of the imaging system, allowing for more compact designs. 07 molkg in terms of monobasic acids, and which has a weight average molecular weight of 4,000 to 100,000 and contains neither a catalyst nor an organic solvent, and a production method thereof.