This paper describes how supplier evaluation used multi criteria and Confidance Interval Approarch at Flavor Company in order to purchase cardboard material supplier. The result of design supplier evaluation six criterion that is seen significant to evaluate supplier by PT MW such: Quality, Delivery, Responsiveness, Flexibility, Relationship, and Cost. The scoring is filled up by the active participant and it is proceed using confidence interval approach method, which is involved purchasing, PPIC, QC, and Packing (warehouse) department. Generaly, the best performance supplier are KS and STG. The result of this supplier evaluation can be used as consideration in deciding the order space policies in the supplier for the next period.