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This study aimed to analyze the influence of normative commitment to employee performance, to analyze the effect of continuance commitment to employee performance and to analyze the influence of affective commitment to employee performance at Plantation Company in Medan. This research approach is associative approach. The population in this study permanent employees plantation in Medan with until as many as 151 people. Data collection techniques in this study with questionnaires and interviews. Data were analyzed using multiple linear regression. The results of this study shows there is no significant effect between affective commitment to employee performance Plantation Company in Medan. A significant effect between continuance commitment to employee performance Plantation Company in Medan. A significant effect between the normative commitment to employee performance Plantation Company in Medan.