The phenomenon of blogging is getting larger by the day. Today there is an endless number of weblogs, or blogs, on the internet. Several of these blogs serves as personal diaries online available for who ever might find them interesting to read. When regulary following a blog the reader can often get the feeling of starting to know the person behind it. In other words, it seems that the blog presents an image of their author. But how do they create this image? Is it actually possible to construct a self-identity on a blog? To be able to find an answer to the question, four blogs of young teenagers between the ages of 14 to 16, which they use as personal diaries online, have been examinated. More precisely, this study investigates how young bloggers construct a self-identity in the blog format.