This paper has studied David Ross`s solutions for ethical mutual competitions. For Ross, the mutual competition happens in ethical duty of the present, and one should give priority to those duties with more emphasized obligation. He has considered special relationship as the foundation for ethical duties upon which the norm for priority and the degree of obligation are based. As is understood by the views of Ross` critics like Palmer, and by the comparison made between his view and religious teachings, the view would not seem fully correct. Such concepts as essential expediency and evil in religious texts, the part by agent`s motivation, considering the consequences of acts and the priority of the consequences upon which the degree of action`s state of being valuable is based (of which the highest is Divine approximation) can be regarded as the ground for a complete solution in the field. Ross` view, therefore, may not be accepted as a complete solution.