Diabetes is one of the non-communicable diseases that must be addressed, Diabetes Mellitus (DM) is a metabolic disease characterised by high blood sugar levels. The aim of this study was to determine the relationship between smoking behaviour and the fulfilment of nutritional needs in the community based on the theory of the health belief model on blood sugar levels in patients with diabetes mellitus. This research was conducted in Geulumpang payong village, Jeumpa District, Bireuen Regency. With the number of population suffering from DM 54 people, the sampling technique uses Total Sampling technique with a total of 54 respondents. This study was conducted in January to April 2023. The design of this study uses analytical methods with a Cross Sectional approach. Data analysis in this study used univariate and bivariate analysis with the following research results, the age of the majority of seniors as many as 25 people (46.3%). The majority of self-employed 37 people (68.9%). The majority of respondents had secondary education (SMA) as many as 40 people (74.1%). Majority light and heavy smoking each had 18 people (33.3%). Blood sugar levels were mostly poor (>179 mg/dl) with 37 people (68.5%). Dietary adherence was mostly non-compliant with 40 people (74.1%). Bivariate results with the Chi-square test there is no significant relationship between smoking and blood sugar levels of patients with DM with a confidence level of 95% (α 0.05), it is known that the p value or Asymp. Sig. (2-sided) is 0.278, meaning that the P value of 0.278 ≤ 0.05. In conclusion, there is a significant relationship between the fulfilment of nutritional needs and blood sugar levels of patients with DM with a confidence level of 95% (α 0.05), it is known that the p value or Asymp. Sig. (2-sided) is 0.000, meaning that the P value of 0.000 ≤ 0.05. It is suggested to improve the lifestyle that is in accordance with health.