Background: Type two Diabetes mellitus is one of the most common health problems all over the world. As evidence by recent studies: Type Two Diabetes Mellitus complications have been more distressed by sleep disturbances. Aim: To evaluate the impact of implementing sleep hygiene program for patients with type two diabetes mellitus and uncontrolled glucose level. Design: Quasi-experimental research design was used. Sample: A purposive sample of 70 patients of both sexes with type two diabetes mellitus (aged 20-60 years, Insomniac patients, diagnosed with type two diabetes for at least 1 year and not more than 10 years). Tools: Two tools were used to collect data. Tool 1: Structured interview questionnaire sheet. Tool 2: Pittsburgh Sleep Quality Index for sleep quality assessment. Results: Majority of studied patients were suffering from poor glycemic control regarding poor sleep quality (70%). More than two thirds of patients in study group suffering from moderate difficulties in all areas of sleep assessment in 1 st interview. While, in 4 th interview was noticed that this percent dropped to less than one quarter. Conclusion: Patients in study group who utilized sleep hygiene program exhibit more glycemic control. Recommendations: Educational module of "sleep hygiene program" must be explained for all Type two Diabetes Mellitus patients and how they can utilize it.