The assessment of the tool used for measuring English vocabulary test is done by using SPSS version 10 for Windows. To determine the validity of each vocabulary test item done by correlating the value of each item with total value by using Product Moment correlation formula. Valid or not the correlation coefficient is counted on the significant level of 5%. items that represent each factor is analyzed thoroughly. From 60 respondent of study subjects consist of 30 test items, there are between 0.3431 to 0.9683 validity values. Thus genuine test items used in this study are 30 test items because r count > r table. (0.3000).