The purpose of  this study was to investigate the effectiveness of applyingmemory strategies for developing vocabulary skills among primaryschool pupils. The participants were forty pupils in fifth year from  Al Mohafaza Ala QuranSchool in Benha at Quliobeya Governorate. The participants of the study were divided into two  groups, the experimental group (N=20) and the control group (N=20). The pre vocabulary test was administered to the participants before the treatment. Then, the experimental group was taught memory strategies using encoding, retrieval, transfer, generation and monitoring strategywhile the control group was taught using the traditional method. Then the post vocabulary test was administered to both groups. Results of the study revealed that the program using memory strategies was effective in developing vocabulary skills among the primary school pupils