This study examined the relationships between psychoticism of Eysenck Personality Questionnaire (EPQ) and smoking behaviours. Subjects were divided into a Higher Psychoticism group (HP, N-10, M-5.1) and a Lower Pyschoticism group (LP, N-17, M-2.1). Subjects were asked to respond to a questionnaire an smoking behavior patterns. The major findings were as follows. The subjects in HP began smoking earlier, were smoking more frequently, and showed lower motivation for abstenence than subjects in LP did It was suggested that HP-subjects' smoking behavior be regarded as a psychological resource which inhibits impulsiveness. Discussion is focused on the need of psychological study of smoking and ways to stop smoking.