The youth, identified as Amritosh Kumar from Chapra district, however, missed his target as the shoe fell near the Chief Minister.
Jumping the queue at 'Janata ke darbar me Mukhya Mantri' programme, the youth shouted that the state government was dividing the society on caste lines.
When the security personnel on duty caught hold of Kumar, he flung the shoe. He was then led out of the hall.
Kumar claimed that he came to the chief minister to complain about his being implicated in a false case by police.
Patna Senior Superintendent of Police Jitendra Rana, who was present at the venue, said the youth has been detained and taken to Sachivalya Police Station for interrogation.
Action would be initiated against him after detailed inquiry into the matter, the SSP said.
Manjhi later told reporters that the youth, a postgraduate student, who was standing behind five or six persons in the queue, turned furious and created a scene before his turn came to talk to the Chief Minister about his problem.
"A probe is on into the incident," Manjhi said.
Asked about Kumar alleging that the state government was dividing the society on castes lines, the Chief Minister said, "I just talk about the poor who hail from SC, ST, extremely backward classes, OBC, minorities and even from forward castes and stress on their welfare."
Asked whether there was any political link to the incident, Manjhi said he was not aware of the details which would emerge only after the probe.

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