Firstly known as "weblog", soon shortened as "blog" in 1999, blogs have always been an important part of online culture. Since then their static nature has changed, and they have offered new opportunities, which in return has started to draw the attention of both educators and researchers increasingly. Soon they have assumed a critical place in language learning, specifically in writing classes. As a result of their nondecremental role in language learning, this study aimed to investigate the effects of using blog in academic writing and determine the attitudes of learners of English as a foreign language at tertiary level. The results indicated a considerable increase in the success scores of the students who used blogging in academic writing, confirming that blogging improves students' writing skills. In parallel with this finding, students also expressed positive attitudes towards the use of blog in their writing activities, which together could imply that students with positive attitudes towards blogging are likely to become better writers.