The present invention provides a phosphor, a phosphor paste and a light emitting device. The phosphor comprises a compound represented by the formula (1) : M 1 3(1-x) Eu 3x M 2 m M 3 n O 3+m+2n (1) wherein M 1 is at least one selected from the group consisting of Ba, Sr and Ca, M 2 is at least one selected from the group consisting of Mg and Zn, M 3 is at least one selected from the group consisting of Si and Ge, and m, n and x satisfy the following relations: 0.9 m 1.1; 1.8 n 2.2; and 0.00016 x < 0.003. The phosphor paste comprises the phosphor, an optional organic binder and an optional solvent. The light emitting device comprises the phosphor, and an optional excitation source for the phosphor.