The objectives of this study are firstly to explore students' self-assessment on four language competence: linguistic, sociolinguistic competence, discourse competence, and strategic competences, secondly to find out whether there is any significant influence of students' length of language learning toward their self-assessment of communicative competences. The research was undertaken at undergraduate program at the university of Lampung. The results showed that communicative competence assessed by students has positive relationship to the score of their performance assessed by teachers. The current research succeeded in modifying students' self-assessment according to the communicative competence.