Although　many　studies　have　been　reported　on　stainless　fiber　reinforced－castables，they　were　discussed　on　the　assumption　that　fibers　were　homogeneously　dispersed　in　the　casted　body　because　of　small　specimens．In　case　of　actual　casting，it　is　however　not　certain　whether　the　fibers　are　homogeneously　distrbuted．Distribution　of　fibers　is　thought　to　be　very　important　to　the　durability　of　fiber　rein　forced－castable　refractories．　We　attempted　to　know　the　distribution　of　fiber　with　nondestmctive　transmitted　X-ray　observation　and　weighing　the　fiber　amount　in　different　parts　of　casted　bodies．The　following　results　are　obtained． 　（1）　Fibers　are　homogeneously　right　after　the　mixing．However　the　modes　of　distributlon　change　during　casting　using　vibrator．Fibers　are　separated　from　mixture，oriented　in　some　direction　or　segregated　in　casted　bodies．The　effects　of　water　content　and　vibration　time　to　the　modes　of　distribution　were　detemined． 　（2）　The　modes　of　fiber　distribution　are　influenced　by　viscosity　of　matrix　in　castable．

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