FIXING MEMBER, FIXING DEVICE, AND IMAGE FORMING APPARATUS

To provide an electrophotographic fixing member that has an elastic layer having a high thermal conductivity in a thickness direction, reducing the likelihood of the occurrence of destruction and plastic deformation, and having a low hardness.SOLUTION: An elastic layer 4 provided on an outer periphery of a base material of a fixing member contains filler that contains inorganic oxide. (1) In a binarized image of a first cross section in a thickness-circumferential direction of the elastic layer, and in a binarized image of a second cross section in the thickness-axial direction of the elastic layer, when A is the area ratio of a first filler in which a major axis/a minor axis when the shape of the filler is elliptically approximated is less than 1.5, and B is the area ratio of a second filler in which the major axis/the minor axis is 1.5 or more, 1.0≤(A/B)≤2.0 and 0.40≤(A+B)≤0.50. (2) The second filler in which the major axis/the minor axis is 1.5 or more has an average orientation angle θAve with respect to a thickness direction of the elastic layer of 50°≤θAve≤90°.SELECTED DRAWING: Figure 4 【課題】厚み方向の熱伝導性が高く、破壊や塑性変形が生じにくく、低硬度な弾性層を有する電子写真定着部材の提供。【解決手段】定着部材の基材外周上に設けられた弾性層４は無機酸化物を含むフィラーを含み（１）該弾性層の厚み−周方向の第１断面の二値化像、および、該弾性層の厚み−軸方向の第２断面の二値化像において、該フィラーの形状を楕円近似したときの長軸／短軸が１．５未満の第１のフィラーの面積割合をＡとし、長軸／短軸が１．５以上の第２のフィラーの面積割合をＢとしたとき、１．０≦（Ａ／Ｂ）≦２．０、かつ、０．４０≦（Ａ＋Ｂ）≦０．５０であり、（２）長軸／短軸が１．５以上の第２のフィラーの該弾性層の厚み方向に対する平均配向角度θＡｖｅが、５０°≦θＡｖｅ≦９０°、である。【選択図】図４