This study aims at investigating whether the use of error analysis can improve the students’ ability in using some and any or not. The research population was the grade VIII students at SMP Negeri 1 Buko. The sample of this research was selected by using cluster sampling technique. The main instrument used to collect the research data was test (pretest and posttest). Having analyzed the data from test (pretest was 27.6, and posttest was 77.8, the researcher found the t-counted value was 18.208 by applying 0.05 level of significance 29 (29-1) degree of freedom (df) was higher than the t-table value 1.701. It means that the research hypothesis was accepted. In other words, the application of Error Analysis was effective to be used in improving students’ grammar learning especially in using “some” and “any”.