To provide an infusion tube which enables an accurate control of the flow rate of an infusion in a method of delivering a fluid by a pump, is appropriate to use in an infusion injection line, and is made of non-polyvinyl chloride.

The infusion tube is formed by molding a resin composition made of a styrene-isoprene-styrene triblock copolymer mixed in 1,2-polybutadiene. (1)The amount of the mixed copolymer based on the total amount of the resin composition is 5-50 percent by weight. (2) The copolymer contains 5-50 percent by weight of the styrene unit, and 3,4-vinyl bond equal to or less than 20 percent in the isoprene block. (3) The infusion tube shows 50-78 in Shore A hardness.