The purpose of this study is to explore primary school children's understandings about the shape of the Earth. The sample is consisted of 124 first-graders from five primary schools located in an urban city of Turkey. The data of the study were collected through children's drawings and semi-structured interviews. Results obtained from the drawings showed that only one third of the participants have drawn scientifically acceptable images of the earth. However, the subsequent semi-structured interviews revealed that more children have scientific knowledge about the shape of the Earth. The results also revealed that cartoons, story books and daily life experiences are the reasons for children's misconceptions.