Dosimetric quantities for 300 keV neutrons in the ICRU standard tissue sphere were evaluated. The Monte Carlo code NEDEP which performs neutron-photon-charged particles coupled transport was used in the direct estimation of absorbed dose and dose equivalent. Some important quantities calculated are as follows; Deep dose equivalent index $H_{I,d}:1.78{times}10^{11};Sv-cm^2$ Shallow dose equivalent index $H_{I,s}:2.08{times}10^{-11};Sv-cm^2$ Ambient dose equivalent $H^*(0.07):1.7{times}10^{-11};Sv-cm^2$ Ambient dose equivalent $H^*(10):1.78{times}10^{-11};Sv-cm^2$ Effective quality factor $bar{Q}^*(10):12.4$