This paper summarize and analyzie the shear charactaristics of tested beams according to provisions of ACI & JSC codes which both of them specifie the shear strength of deep beams based on the first diagonal crack strength of normal strength concrete NSC beams without taken into account the beam size effect. Hence, it is substantial to evaluate the applicability of JSCE & ACI shear design equations to high strength reinforced concrete (HSRC) deep beams with main steel ratio less and more than 1% with considering beam size effect or not. f'c=60 MPa, three values of main reinforcement, (ρs%), (0.73,1.21 &1.83) and shear span to overall depth ratio, (a/h), ( 0.84,0.87,1.3 &1.7) were selected to study the shear characteristics of 18 simple span deep beams without stirrups. The increase in overall depth (h) under the same a/h=1.3&1.7, led to more brittle failure with wide diagonal cracks. HSRC deep beams exhibited more remarkable size effects with regard to brittle behavior. It was also shown that the ACI code gives similar safety factors on the shear strength at the first diagonal crack of HSRC deep beams, but do not specify a high enough safety factor on their ultimate strength due to the size effects.