Guillain-Barré syndrome is an acute generalized polyneuropathy which usually follows infection with a virus or bacteria, although rarely vaccination may be associated with it. We present a case of a 44-year-man who presented with progressive weakness of both lower limbs since 6?days, neurological examination findings were consistent with flaccid-type paraplegia and investigation findings including lumbar puncture and nerve conduction studies were consistent with the diagnosis of Guillain-Barré syndrome. He had received the Johnson and Johnson corona virus disease-19 vaccine intramuscularly 15 days before his presentation. Only potential triggering factor in this case was positive finding of Jansen Vaccine. Keywords: Guillain-Barré syndrome; immunoglobulin; jansen vaccine; polyneuropathy.