Abstract The trunk conformations of the Gyeongju Donggyeongi (GD), Korean native dog was measured in the present study. Also, the information of reproductive activity was investigated in GD dogs. A total of 73 dogs were randomly selected out of 121 dogs in the Gyeongju County in July 2010, which were registered by inserting electronic chips in the withers. The hair colors of the GD were white, yellow, black and tiger brindle, the mean withers heights were 45.46±4.17 cm and 49.28±3.56 cm for female and male dogs, respectively The mean body length to withers height ratios were 117.63% and 116.4% for the female and male dogs. Concerning the reproductive capability of the GD, the mean litter number was 4.6±1.7, the optimal mating time was 12.5±2.3 days after the rutting season and the mean gestation period was 60.2±2.8 days. The results of this study would be useful for compiling the official standard for the adult GD. Key words : Gyeongju Donggyeongi (GD) dogs, Trunk conformation, Reproductive activity