A phosphor has the general formula (M2x,M3y,M4z)mM1O3X(2/n), wherein M1 represents at least one element including at least Si and selected from the group consisting of Si, Ge, Ti, Zr, and Sn, M2 represents at least one element including at least Ca and selected from the group consisting of Ca, Mg, Cd, Co, and Zn, M3 represents at least one element including at least Sr and selected from the group consisting of Sr, Ra, Ba, and Pb, X represents at least one halogen element, M4 represents at least one element including at least Eu2+ and selected from the group consisting of rare-earth elements and Mn, m is in the range 1≦m≦4/3, n is in the range 5≦n≦7, and x, y, and z are each in such a range as to satisfy x+y+z=1, 0.45≦x≦0.8, 0.05≦y≦0.45, and 0.45, and 0.03≦z≦0.35.