The main purpose of this study was to examine whether there is significant relationship among students' grade level, attitudes and use of Tigrigna language in English classroom. In this study attitudes of four grade level students toward Tigrigna language use in EFL classroom was also investigated. The study was Co-relational rese~ch which involves quantitative and qualitative methods of analysis. The participants of the study were gr!des nine, ten, eleven and twelve students of Suhul Michael Secondary School. The sample size was 250 students. Those samples were selected using different sampling methods. To reach the study on the intended stage, different data gathering and analysis tools were used. To gather data from the intended group questionnaire, observation and interview were used. The quantitative data obtained from the questionnaire was analyzed using the Statistical Package for Social Science (SPSS) version 16.0. The primarily statistical analysis utilized were descriptive statistics, one sample t-test, one way ANOVA, Pearson correlation coefficient and percentage. The result.of the study indicated that grades nine, ten and eleven students tend to have high attitudes toward'the implementation of Tigrigna language in English session. But grade twelve students seemed to have low attitudes toward Tigrigna language use. The findings also showed that there was significant negative relationship between the students' grade level and attitudes toward Tigrigna language use in English lesson. But there was medium positive relationship between the students' attitudes and perceived use of Tigrigna language in English class. The output of the study also revealed that grades nine and ten students tend to use Tigrigna ~ language much frequentiy'in English class whereas grades eleven and twelve students use it less frequently in English session for different purposes. The results of the study indicated that high percentage of first language was used in.grade nine English class, followed in grades ten, eleven and twelve English lessons. Similarly, much time was devoted to utter first language words in grade nine English class compared to other grade levels. Therefore, these students should be provided a training like ( EL/P) English Language Improvement Program to enrich their usage of the target language.