The Frenchman, 23, will go straight into the squad for Saturday's Championship game against Cardiff City.
"He can play on the left, on the right and down the middle as a striker," said Ian Baraclough, the Iron manager.
"He's something different to what I've got in the building and will be a good addition to the squad I'm sure.
"He can play on the left, on the right and down the middle as a striker," said Ian Baraclough, the Iron manager.
"He's something different to what I've got in the building and will be a good addition to the squad I'm sure."
N'Guessan began his career at the French side Auxerre before moving to Glasgow Rangers. After failing to break into the first-team at Ibrox he had spells with Boston and Hartlepool before joining Lincoln City.
He moved to Leicester at the start of last season and was a regular under the previous Foxes manager Nigel Pearson, but has fallen out of favour this term.