Children's body posture has been studied more and more by physical therapy, as well as mouth breather children have been studied by speech-language-hearing therapy. This study tries to check, through scientific literature, the relationship between stomatognathic functions and body posture in mouth breather children. This is a review of literature on body posture and the stomatognathic system in obstructive and functional mouth breathers. We searched, in electronic data basis such as MEDLINE, SCIELO and LILACS, and Google Scientific, articles related to these topics, published in the last 10. The selected articles were organized according to authors, title, source, age, and publishing year. When related to the type, the studies were considered: literature review articles; descriptive data analysis; field research. After selecting the texts, we identified four studies that relate posture, stomatognathic system and mouth breathing; two studies that relate stomatognathic system and posture; 13 studies relating to the stomatognathic system and mouth breathing. We may perceive that there is a lack of studies correlating body posture and stomatognathic system in oral breathers. The lack is even higher when we compare obstructive oral breathers and vicious oral breathers relating the body posture to the stomatognathic system.