Cannabis poisoning is rarely reported in young children. We present the case of a child twenty months old admitted to the Emergency Room because of sopor, hypotonia and miosis. This is the first out of 1150 poisonings under the age of five registered at Trieste between 1975-1992. Cannabis poisoning has to be considered despite its rarity in a child with neurologic symptoms of unknown etiology and acute onset, especially when family behaviour is suspect for toxicomania.