The dyeing characteristics and fastness of rayon-mimetic (RMM) fiber were examined with some commercial disperse dyes compared to those of poly(ethylene terephthalate) fiber. Similar exhaustion yields were achieved at $120^{circ}C$ to $130^{circ}C$ which ranged from 90% to 99%. Critical adsorption range of disperse dyes on RMM fiber was lower than regular PET fiber about $10^{circ}C$. Exhaustion was saturated at 2% owf dye concentration. Color fastness of RMM was similar to those of PET dyeings including fastness to wash, rubbing and light.