Comment Not always against religious law (Score 5, Informative) 582
Organ donation is NOT always against Jewish law (Halacha). In fact there is almost always a way that it is totally fine and even further, there are interpretations that suggest that not being an organ donor is a violation of Halacha!
Please see http://hods.org/ for a very good observant Jewish organization that seeks to make more orthodox Jews organ donors.