Volatile compounds in Pinus densiflora were extracted with Likens-Nickerson apparatus for three hours, and were separated and identified by gas chromatography(GC) and mass selective detector(MSD). Twenty six compounds were isolated from Pinus densiflora, identified by GC-MSD and twelve compounds were confirmed by matching retention times of the pure comounds. The main valatile compounds were terpenoids such as limonene(36.2%), $eta$-pinene(16.9%), $eta$-myrcene(12.6%) and $alpha$-pinene(10.9%), and the total amount of these main compounds was 367.9$mu extrm{g}$ per 1g of pine twigs.