The man invited the press to his house in Marseille in southern France the day after the supposed attack in November, saying he had been beaten by three men claiming to represent the jihadist group.
But a police source confirmed today that the man had been arrested for allegedly fabricating the story.
He is not the only French teacher to be accused of lying about an IS attack. In January, a nursery school teacher was sent for psychiatric tests after admitting he lied about an attack in his classroom.
But he later admitted inventing the story and cutting himself on the neck and side.
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The cases came with France still on edge in the wake of the November attacks in Paris, claimed by IS, that killed 130 people.
There is no doubt over another attack in Marseille in January, when a teacher wearing a kippa, a Jewish skullcap, was set upon by a self-radicalised teenager -- the latest in a series of anti-Semitic incidents in the port city.