Opposing notions of justice held by parties frequently contribute to the complexity of conflict and its resolution. Yet the implications of this reality remain poorly explored in scholarship and often little recognized in policy approaches. This chapter delineates different causes behind and roots of opposing justice notions in conflicts situations. A range of means available to tackle them are then developed. So called integrative strategies of negotiation and conflict resolution are put forward as most promising if certain preparatory steps, involving a third party and trust building among other matters, are taken.