Academic procrastination is the tendency to postpone studying or doing class assignments. Despite more than 20 years of intense research on the subject, it is still unclear how this habit is related to certain psychological and educational variables. The present study investigated in N = 169 secondary and undergraduate students how academic procrastination is related to sex, age, education level, average mark, motivation and class attendance rate. According to previous research, results showed that procrastination is not connected to sex, age or education level; moreover, the tendency to delay doing academic tasks is significantly and negatively related to academic qualifications and the motivation to learn. In contrast, there is a lack of publications aimed at analyzing the relation between academic procrastination and class attendance. The present findings corroborate the view that the more the students are inclined to attend lessons the less they tend to put off their academic duties. Thus in all kinds of teaching and learning programs it seems worth scheduling frequent meetings between the pupils and the tutor, in order to prevent the students from non-purposively delaying doing their academic tasks.