A pneumatic tire for motorcycles is provided in which wear resistance is assured and the steering stability at a turn is improved as compared with the conventional tire by improving a grip ability.The pneumatic tire for motorcycles comprises a carcass 2 extending toroidally between a pair of bead portions, at least one ply of belt layer 3 installed outside thereof in the direction of the radius of the tire, and a tread portion placed outside of the belt layer in the direction of the radius of the tire. When, in said tread portion, the 50% region of the developed width of the tread whose center is on the tire equatorial plane is defined as “tread center portion”, the 25% regions of the developed width of the tread region each of which is on the either side of the tread center portion are defined as “tread side portion”, and each of the tread side portion is divided into three equal parts which are defined from the tread end in order as region A, region B and region C, the average modulus of elasticity of the tread rubber in the region B at 100% elongation at a temperature of 40° C. is larger than the average modulus of elasticity of the tread rubber in the region A and in the region C at 100% elongation at 40° C.