The purpose of this study is to identify the relationship between causes of truant, types of truant and activities done during truant against academic achievement among the lower secondary students. The respondents for this study were 80 students from form 1, 2 and 3 were randomly chosen as respondents through simple random sampling. The findings showed that the causes of truant are at the medium level and types of truant are at the low level. Activities done during truant such as helping the family, joining the negative groups, crime are at the low level and working part-time together with loafing are at the medium level. Findings also showed there is no significance relationship between friends, parents, do not like the teacher, do not like the subject and homework with academic achievement and there is significance relationship between family problem with academic achievement. There is no significance relationship between school truant and extra curriculum truant with academic achievement but there is significance relationship between class truant with academic achievement. Findings also show that there is no significance relationship between helping family, loafing and joining the negative groups with academic achievement and there is significance relationship between working part-time and crime with academic achievement