The effects of oxymethylation and chelation of nylon 6 were examined. The physical properties, antistatic effect, dyeing property, and heat-resistance of modified fibers were compared with those of the untreated control materials and with each other. The results obtained in this paper are follows: 1) Profitable results are obtained from the degree of oxymethylation in less than 35.5% on oxymethylated fiber. At 10.0~11.4% of degree of oxymethylation melting points of fibers are risen 2~4$^{circ}C$, the other side tenacity and elongation of fibers are fallen a little. 2) By chelation, ZnCl2 treated fibers are observed increase of hydrophillic property and heat-resistance than Al2(SO4)3 treated fibers, i.e., 5~7% of increase in hygroscopicity and 7~8$^{circ}C$ of melting point, while 2~3% of decrease in tenacity and elongation. 3) The antistatic effects of fibers are improved greatly by chelation of fibers, e.g., 0~0.015 KV of electric Potential difference are observed. And, also antistatic effects are slightly improved by oxymethylation. 4) The dye adsorption of nylon 6 are improved by oxymethylation, but chelated nylon 6 are poor in adsorption. The increase of dye adsorption was about 26~39% at oxymethylated fiber