Provided are ferrite particles containing a material represented by the compositional formula MXFe3-XO4 (wherein M denotes at least one among Mg and Mn, and 0<=X<=1) as a primary component, and containing at least one of elemental Sr and elemental Ca at a total content of 0.1 wt.% to 2.5 wt.%. When the ferrite particles are used as a carrier, the flow rate following magnetization in a magnetic field having a magnetic field strength of 1000/(4pi) kA/m (1000 oersted) is preferably 40 seconds or more in order to obtain higher image density. In addition, the residual magnetization ([sigma]r) is preferably 3 Am2/kg or higher.