As a typical material for radiation detection, glass scintillator plays an important role in various applications, including medical imaging, high-energy physics, environmental monitoring and security inspection. According to structure features and applications, glass scintillator is mainly classified into high-density glass scintillator, low-density glass scintillator and glass-ceramics scintillator. This article describes various types of glass scintillators, focusing on their fabrication procedures, microstructures, optical properties and applications. The outlook of the future developments of the glass scintillators is also discussed.