In the previous paper, the authors proposed thenew shear loading systcm in order to eva 訌 uate shear transfer mechanism en concrete crack sur 飴 ce . The overview ofthis testing system was explained already . ln this paper, the sbear transfer mechanism is verified ffOm experirnental resultS conducted using th 正 s new device , Furthermore , the experiments with constant contact ratio is conducted to observe thc behavior of contact stress on local crack surface . As a r ¢ sult , the behaVior ofeontact strcss can be ebtained for the first time . And iI was con 婿 ed that softening phenomenon was occurred on bcal crack surface . KCV レords : Concrete Craek Surfaee, C 厂ack width . Sh 砌 7 肋 η K Co η' σo !5舵 5畠 Constitutive Eguation