The 15th International Workshop on Next generation Nucleon Decay and Neutrino Detectors (NNN14) will be held at APC, Paris-Diderot Campus, in Paris, France, from November 4 to 6, 2014. The primary purpose of this series of workshops is to discuss future large scale detectors for research on nucleon decays and neutrino physics. Following the successful format of the previous workshops, the workshop will consist of invited plenary talks and a small number of contributed talks addressing the following topics: