Objective: This study aimed to clarify the relationship between daily time management and quality of life (QOL) in employed patients with type 2 diabetes and consider methods for patient education utilizing daily time management. Method: A questionnaire survey was administered to employed patients with type 2 diabetes. The survey consisted of basic attributes, daily time management, and health-related QOL. Regarding statistical analyses, multiple regression and decision tree analysis were performed with health-related QOL as the dependent variable and daily time management as the independent variable. Results: The analysis set consisted of 187 subjects. Multiple regression analysis found relationships between daily time management and both mental and role/social aspects of health-related QOL. Decision tree analysis showed that the item most closely related to mental aspects was "time control" while the item most closely related to role/social aspects was "adjustment of work." Conclusion: When providing care to patients from the perspective of daily time management, it is beneficial to help patients learn how to manage their time while focusing on "time control" and emphasizing independent decision making by the patient.