In order to introduce the performance-based design framework into the design of quay walls, it is necessary to stipulate the allowable displacements of the quay walls as one of the performance requirements. This paper aims at presenting the allowable displacement for gravity type and sheet pile type quay walls against the level-one earthquake ground motion. We conducted series of earthquake response analyses by using the level-one earthquake ground motion obtained by the earthquake hazard analysis and evaluated the displacements of the quay walls for each structural type. We proposed the average displacements as the allowable displacements of the quay walls.