A charging member for charging a surface of a member to be charged in an electrophotographic apparatus, said charging member comprising: an electro-conductive substrate ; and an electro-conductive surface layer provided on the electro-conductive substrate , wherein: the electro-conductive surface layer comprises a binder resin, electro-conductive particles dispersed in the binder resin; and resin particles for roughening a surface of the electro-conductive surface layer , the surface being the surface of the electro-conductive surface layer which is to be brought in contact with the member to be charged; the surface of the electro-conductive surface layer has a plurality of protrusions each formed from one of the resin particles , characterized in that each of the resin particles has pores inside thereof, has a porosity Vt of 2.5% by volume or less as a whole, and has a region whose porosity V 11 is 5% by volume or more and 20% by volume or less, wherein the region is farthest away from the electro-conductive substrate in each of the resin particles , and assuming that each of the resin particles is a solid particle having no pores, the region corresponds to an 11% by volume-occupying region of the solid particle. an electro-conductive substrate ; and an electro-conductive surface layer provided on the electro-conductive substrate , wherein: the electro-conductive surface layer comprises a binder resin, electro-conductive particles dispersed in the binder resin; and resin particles for roughening a surface of the electro-conductive surface layer , the surface being the surface of the electro-conductive surface layer which is to be brought in contact with the member to be charged; the surface of the electro-conductive surface layer has a plurality of protrusions each formed from one of the resin particles , characterized in that each of the resin particles has pores inside thereof, has a porosity Vt of 2.5% by volume or less as a whole, and has a region whose porosity V 11 is 5% by volume or more and 20% by volume or less, wherein the region is farthest away from the electro-conductive substrate in each of the resin particles , and assuming that each of the resin particles is a solid particle having no pores, the region corresponds to an 11% by volume-occupying region of the solid particle. the electro-conductive surface layer comprises a binder resin, electro-conductive particles dispersed in the binder resin; and resin particles for roughening a surface of the electro-conductive surface layer , the surface being the surface of the electro-conductive surface layer which is to be brought in contact with the member to be charged; a binder resin, electro-conductive particles dispersed in the binder resin; and resin particles for roughening a surface of the electro-conductive surface layer , the surface being the surface of the electro-conductive surface layer which is to be brought in contact with the member to be charged; the surface of the electro-conductive surface layer has a plurality of protrusions each formed from one of the resin particles , characterized in that each of the resin particles has pores inside thereof, has a porosity Vt of 2.5% by volume or less as a whole, and has a region whose porosity V 11 is 5% by volume or more and 20% by volume or less, wherein the region is farthest away from the electro-conductive substrate in each of the resin particles , and assuming that each of the resin particles is a solid particle having no pores, the region corresponds to an 11% by volume-occupying region of the solid particle. <EOS>