Riley Pearson was suspended for four days from Colnbrook C of E Primary School near Slough, for having a packet of cheesy chips in his lunchbox.
Senior staff at the school decided that Riley should be kept way from lessons for continually flouting its healthy eating policy with his choice of the cheesy snack, The Independent reported.
The school has implemented a healthy eating plan from the beginning of term, which asked parents to provide a balanced meal and refrain from giving their children chocolate, sweets, crisps and fizzy drinks.
The school sent a letter to parents in January asking that packed lunches be "healthy and balanced".
Riley's lunch usually consists of a sandwich, yoghurt tube, cheese spread snack and a packet of cheesy chips and water.
Riley's mother Natalie Mardle, who lives with Riley's father, airport worker Tom Pearson, said Riley eats healthy, well-balanced meals at home.
The pair will be attending a further meeting with head teacher to learn whether their son can return to the school.
