The aft end of longitudinal bulkhead in tanker is, in most cases, situated at or near the section where shearing force acting on the hull is maximum in its after body. Therefore, it is one of the important problem in longitudinal strength of tankers that how much shearing force is loaded by longitudinal bulkhead. The auther studied the problem both theoretically and experimentally. As the results, the aft end part of longitudinal bulkhead loads high percentage of the total shearing force has become clear.