A pneumatic tire comprising: on a tread surface, a plurality of circumferential main grooves extending continuously in a tread circumferential direction and a plurality of land portions defined by the circumferential main grooves and tread edges (TE1, TE2); central sipes, in a central land portion formed on a tire equatorial plane, extending in a tread width direction and being formed at a predetermined pitch length, the central land portion being continuous in the tread circumferential direction between adjacent central sipes; and intermediate sipes (51, 53), in intermediate land portions adjacent to the central land portion on both sides in the tread width direction with the circumferential main grooves (22, 23) therebetween, extending in the tread width direction and being formed at a predetermined pitch length, each intermediate land portion (32, 35) being continuous in the tread circumferential direction between adjacent intermediate sipes; wherein the pitch length of the intermediate sipes (51, 53) is longer than the pitch length of the central sipes; and wherein both ends of the central sipes open into the circumferential main grooves (22, 23), characterised in that the central sipes have a chamfered portion at an opening position to the tread surface, wherein the intermediate sipes (51, 53) have a chamfered portion (61, 63) at an opening position to the tread surface; and wherein a dimension in the tire circumferential direction of the chamfered portion of the central sipes in the central land portion is greater than a dimension in the tire circumferential direction of the chamfered portion of the intermediate sipes in one intermediate land portion adjacent to the central land portion and is less than a dimension in the tire circumferential direction of the chamfered portion of the intermediate sipes in another intermediate land portion adjacent to the central land portion. on a tread surface, a plurality of circumferential main grooves extending continuously in a tread circumferential direction and a plurality of land portions defined by the circumferential main grooves and tread edges (TE1, TE2); central sipes, in a central land portion formed on a tire equatorial plane, extending in a tread width direction and being formed at a predetermined pitch length, the central land portion being continuous in the tread circumferential direction between adjacent central sipes; and intermediate sipes (51, 53), in intermediate land portions adjacent to the central land portion on both sides in the tread width direction with the circumferential main grooves (22, 23) therebetween, extending in the tread width direction and being formed at a predetermined pitch length, each intermediate land portion (32, 35) being continuous in the tread circumferential direction between adjacent intermediate sipes; wherein the pitch length of the intermediate sipes (51, 53) is longer than the pitch length of the central sipes; and wherein both ends of the central sipes open into the circumferential main grooves (22, 23), characterised in that the central sipes have a chamfered portion at an opening position to the tread surface, wherein the intermediate sipes (51, 53) have a chamfered portion (61, 63) at an opening position to the tread surface; and wherein a dimension in the tire circumferential direction of the chamfered portion of the central sipes in the central land portion is greater than a dimension in the tire circumferential direction of the chamfered portion of the intermediate sipes in one intermediate land portion adjacent to the central land portion and is less than a dimension in the tire circumferential direction of the chamfered portion of the intermediate sipes in another intermediate land portion adjacent to the central land portion.