Background: Gingivitis is a disease that is closely related to the problem of oral hygiene. The lower a person's oral hygiene, the more easily attacked by gingivitis. The risk of gingivitis can be reduced by consuming marine fish. The higher level of marine fish consumption, the lower gingival index. High fat marine animals, cod fish oil, and oil fish are omega-3 sources. Omega-3 has been proven to cure inflammation in studies in vivo and in vitro. Objective: The purpose of this study was to determine the relationship of consumption patterns of marine fish with gingivitis status in children aged 12-13 years in SMP N 2 Kretek in 2019. Methods: The type of this study was observational analytic with cross sectional design. The study took place in May 2019 - June 2019 in SMP N 2 Kretek. The subjects of this study were 62 respondents selected using the total sampling method with the age criteria of 12-13 years old. The consumption pattern of marine fish was assessed by questionnaires and gingivitis was measured using a modified gingival index. Data analysis used was Spearman correlation test. Results: The results of this study indicate that there is no significant relation between consumption patterns of marine fish with gingivitis status (p >0.05). Conclusion: There is no relationship between consumption patterns of marine fish with gingivitis status in children 12-13 years old in SMP N 2 Kretek.