Abstract: An electroconductive particle is composed of a core particle and tin oxide containing at least one element whose valence is equal to or smaller than four and located on the surface of the core particle. The tin oxide containing at least one element whose valence is equal to or smaller than four has a crystallite size of 5 to 20 nm. The element whose valence is equal to or smaller than four is preferably an element of the group 1 of the Periodic Table, an element of the group 2 of the Periodic Table, an element of the group 4 of the Periodic Table, an element of the group 12 of the Periodic Table, or an element of the group 13 of the Periodic Table. The content of the element whose valence is equal to or smaller than four is preferably 0.045 mol % to 20 mol % relative to tin.