The present invention provides a negatively chargeable spherical toner having: a toner mother particle having a binder resin and a colorant, which has: a number average particle size of from 4.5 to 9 .mu.m; a particle size distribution that has an integrated value of particle sizes of 3 .mu.m or less of 1% or less; and an average sphericity of from 0.95 to 0.99; and an alumina fine particle externally added to the toner mother particle, which has a number average particle size of from 0.1 to 1.0 .mu.m, wherein a work function (.PHI..sub.t) of the toner mother particle is larger than a work function (.PHI..sub.A) of the alumina fine particle by at least 0.4 eV.