Quaternary-structured semiconductors Cu2MSnS4 (M = Fe, Co, Ni and Mn) are important materials due to indium free content and consisting of earth abundant elements, which can significantly decrease the cost of devices. Here, we have successfully produced Cu2FeSnS4, Cu2CoSnS4, Cu2NiSnS4 and Cu2MnSnS4 nanofibers by a simple electrospinning technique. Polyacrilonitrile (PAN) was used as a templating polymer to decrease imperfections in crystal lattice. Outstanding structures with only a few defects and diameter range from 150 to 250 nm were produced. The resulting CuMSnS fibers were characterized by XRD, HR-TEM, EDS, SEM - Mapping, UV-Vis and CV to investigate the crystal structure, composition, morphology, and band gap. This work demonstrates that Cu2MSnS4 nanofibers have p-type conductivity and are promising absorber materials for energy-conversion applications. (C) 2015 Elsevier B.V. All rights reserved.