The aim of the study is to identify common writing errors of the first graders in primary school. The sample of study was consisted of 67 students. Case study was used for the research design. A data collection tool was developed for identifying the errors that students have made while writing vertical lowercase letters. According to the findings, the most common types of errors encountered occurred as a result of non-compliance with the rules related to the writing directions of the lowercase letters. Also, it was seen that curved shaped were drawn in some letters which must have been drawn a line-shaped, that some letters were drawn round not fully closed which must have been drawn round, that the round of letters were drawn as ellipses that when the letters were drawn ellipse-shaped letters were drawn in a tilted way and that the round of letters was combined with the line in the wrong side.