The purpose of this study was to evaluate the effects of the Cawthcrnes head exercise on the benign paroxysmal positional vertigionous patients. Quasi-experimental research method was implemented. The sample was composed of 54 positional vertiginous patients who attended Neuro-Otology clinic Department of Ctolaryngology Faculty of Medicine Siriraj Hospital during November 1986 to March 1987. The samples were selected after diagnose was given as "Positional Vertigo Benign paroxysmal type." The samples were devide into 3 groups by using matching sampling method. Each group consisted of 18 vertiginous patients. The experimental group I recieved antivertiginous drug, vitamin B1-6-12 and Cawthornes head exe4rcise. The experimental group II recieved vitamin B1-6-12 and Cawthornes head exercise. Lastly, the control group recieved antivertiginous drug and vitamin B1-6-12. Tool used in assessing intensity level of vertigo was modified from the visual analogue scale and had demonstrated a reliability of 0.966. The samples were asked to assess their intensity levels of vertigo daily by themselve. The followed up of all samples were done every two weekly within a period of 8 weeks. The data were analysed by using ANOVA and Kruskal Wallis H-test for study adaptation period of improvement vertigo. Since there was an association between personality and vertigo, all vertiginous patients were evaluated their personality by using Thai version of the Eysenck Personality Inventory (EPI) questionare, which was translated by associate professor Dr. Suchitra Prasansuk. The EPI questionare had demonstrated a relibility efficieney 0.84. The EPI score were identified as Neuroticism (N) and Extraversion-Introversion (E), included Lie Scale (L) to detect attempts to falsify responses. The EPI score of non-improvement group was compared to the EPI score of improvemen group within a period 8 weeks. The data were analyard by using t-test. The result were as follows:- 1. By 8 weeks, in 7 vertiginous patients, or 38.88%, of experimental, group I were absent from vertigo. In 9 cases, or 50% of experimental group II demonstrated the same result. Only 4 cases, or 22.22%, in control group showed absent from vertigo also and there was statstically significant different between decrease intensity level of vertigo of 3 groups (p<0.01-.001) after the last 2(nd),4(th),6(th) and 8(th) week during the period of th experiment. 2. There was no statisticelly significant different between the changiable intensity level of 3 groups (p>.05) after the last 2(nd),4(th),6(th) and 8(th) week during the period of the experiment. 3. There was no statistically significant different between the adaptation period for reducing vertigo of 3 groups (p<.05) 4. There was no statistically significant different between the personality in term of Neuroticism (N) and Extraversion - Introversion (E), include a response distortion (Lie Scale) (L) of the improvement group and non-improvement group (p>.05).