This tester has been developed based on the gravure printability tester, for readily evaluating the flexographic printability of paperboard, liner and plastics. Need for flexographic printing has been ever more increasing, along with needs for more rational and cost-effective packaging today. Unlike the heliogravure, the flexographic printing is a type of letterpress printing with the rubber cylinder in contact with the impression cylinder at a low pressure. This tester is composed of plate cylinder, impression cylinder, anilox roll, ink roll and ink vat. The ink sent from the ink roll in the ink vat is adjusted in supply amount by setting the interval between ink roll and anilox roll, so that an adequate amount of ink is applied to the plate and transferred onto the printing sheet. This tester is provided with a mechanism for correcting the difference in circumferential speed due to a small difference in diameter of pate cylinder and impression cylinder and anilox roll, thereby preventing roll slip.