This study was carried out to examine the proper site fur Pinus rigida × P. taeda. The 91 sample plots (20×10m) were selected from the plantations located in middle part of Korea. Soil, environmental and climatic factors were investigated and regressed on the growth of Pinus rigida × taeda. ① The factory which influenced strongly on tire growth were temperature, elevation, soil moisture, physiographic position, slope, soil depth, wind protection, soil compactness and soil organic matter contents in order. ② The most effective factors among them mere temperature, elevation, soil moisture and physiographic position. ③General conditions of proper site for planting the hybrid pine were above-8℃ in mean minimum temperature in January, below 200m in elevation, moderate soil moisture, and valley or flat area in physiogtaphic position.