A (C6H5C2H4NH3)2PbI4 crystal was prepared to investigate its photoluminescence (PL) and scintillation properties. Two PL emission peaks at 525 and 560 nm derived from the recombination of excitons were observed. The obtained PL decay curve was aA (C6H5C2H4NH3)2PbI4 crystal was prepared to investigate its photoluminescence (PL) and　scintillation properties. Two PL emission peaks at 525 and 560 nm derived from the　recombination of excitons were observed. The obtained PL decay curve was approximated　from　the sum of three exponential decay functions related to the excitonic luminescence. Under X-ray　irradiation, the excitonic emission at 560 nm from shallow trap centers was observed, and the X-ray induced scintillation decay times were 0.8, 6.0, and 37 ns. The full energy peak was observed under 241Am α-ray (5.5 MeV) irradiation, and the light yield was estimated to be ~2900 ph/5.5 MeV-α. pproximated from the sum of three exponential decay functions related to the excitonic luminescence. Under X-ray irradiation, the excitonic emission at 560 nm from shallow trap centers was observed, and the X-ray induced scintillation decay times were 0.8, 6.0, and 37 ns. The full energy peak was observed under 241Am α-ray (5.5 MeV) irradiation, and the light yield was estimated to be ~2900 ph/5.5 MeV-α.