A magnetic carrier comprising: resin-filled magnetic core particles including porous magnetic particles and resin held in the pores of the porous magnetic particles; and a resin coating layer formed on the surface of each of the resin-filled magnetic core particles, wherein (i) the surface roughness Ra of the porous magnetic particles is in the range of 0.180 μm to 0.250 μm, (ii) within the pore size ranging from 0.1 μm to 3.0 μm in the pore size distribution of the porous magnetic particles, the peak pore size in which the differential pore volume is maximum is in the range of 0.40 μm to 1.00 μm, (iii) the amount of the resin held in the pores is in the range of 3.0 parts by mass to 5.5 parts by mass relative to 100 parts by mass of the porous magnetic particles, (iv) the amount of resin used for forming the resin coating layer is in the range of 1.0 part by mass to 3.0 parts by mass relative to 100 parts by mass of the porous magnetic particles, and (v) the surface roughness Ra of the magnetic carrier is in the range of 0.160 μm to 0.220 μm, and wherein the resin coating layer is formed of an acrylic resin, and the acrylic resin is a copolymer of an acrylic monomer having a molecular structure containing a cyclic hydrocarbon group, and another monomer. resin-filled magnetic core particles including porous magnetic particles and resin held in the pores of the porous magnetic particles; and a resin coating layer formed on the surface of each of the resin-filled magnetic core particles, wherein (i) the surface roughness Ra of the porous magnetic particles is in the range of 0.180 μm to 0.250 μm, (ii) within the pore size ranging from 0.1 μm to 3.0 μm in the pore size distribution of the porous magnetic particles, the peak pore size in which the differential pore volume is maximum is in the range of 0.40 μm to 1.00 μm, (iii) the amount of the resin held in the pores is in the range of 3.0 parts by mass to 5.5 parts by mass relative to 100 parts by mass of the porous magnetic particles, (iv) the amount of resin used for forming the resin coating layer is in the range of 1.0 part by mass to 3.0 parts by mass relative to 100 parts by mass of the porous magnetic particles, and (v) the surface roughness Ra of the magnetic carrier is in the range of 0.160 μm to 0.220 μm, and wherein (i) the surface roughness Ra of the porous magnetic particles is in the range of 0.180 μm to 0.250 μm, (ii) within the pore size ranging from 0.1 μm to 3.0 μm in the pore size distribution of the porous magnetic particles, the peak pore size in which the differential pore volume is maximum is in the range of 0.40 μm to 1.00 μm, (iii) the amount of the resin held in the pores is in the range of 3.0 parts by mass to 5.5 parts by mass relative to 100 parts by mass of the porous magnetic particles, (iv) the amount of resin used for forming the resin coating layer is in the range of 1.0 part by mass to 3.0 parts by mass relative to 100 parts by mass of the porous magnetic particles, and (v) the surface roughness Ra of the magnetic carrier is in the range of 0.160 μm to 0.220 μm, and wherein the resin coating layer is formed of an acrylic resin, and the acrylic resin is a copolymer of an acrylic monomer having a molecular structure containing a cyclic hydrocarbon group, and another monomer.