expression, godan verb (-u)
not believe one's ears; can't believe what one is hearing
Used when what one hears is so surprising or shocking that one doubts its truth. Often in past tense 耳を疑った.
彼の突然の辞職の知らせに、私は耳を疑った。
I couldn't believe my ears at the news of his sudden resignation.
その話を聞い
Anyone would not believe their ears upon hearing that story.