PROBLEM TO BE SOLVED: To provide an abnormal tissue detecting device capable of highly accurately detecting an abnormal tissue at an inspection site. An abnormal tissue detecting apparatus compares each of a plurality of received signals IS_n with a reference signal SS generated by weighting and adding each of the plurality of received signals IS_n by a weighting factor, thereby obtaining an abnormal tissue. The component of the reflected wave from is detected. Here, the weighting coefficient for each of the plurality of reception signals IS_n is a component of a direct wave from the transmission antenna to the reception antenna between each of the plurality of reception signals IS_n and the reference signal SS, as compared with the case where the weighting is made uniform. Is determined so that the sum of the differences in the signal strength in the section including is small. [Selection diagram] Fig. 6【課題】検査部位の異常組織を高精度に検出できる異常組織検出装置を提供することを目的とする。【解決手段】異常組織検出装置は、複数の受信信号ＩＳ_ｎのそれぞれと、複数の受信信号ＩＳ_ｎのそれぞれを重み係数によって重み付け加算することにより生成される基準信号ＳＳとを比較することにより、異常組織からの反射波の成分を検出する。ここで、複数の受信信号ＩＳ_ｎのそれぞれに対する重み係数は、重み付けを均一にした場合に比べて、複数の受信信号ＩＳ_ｎのそれぞれと基準信号ＳＳとの、送信アンテナから受信アンテナへの直接波の成分を含む区間における信号強度の差の合計が小さくなるように決定される。【選択図】図６
