Yes – hedgehogs can safely eat banana but only as a rare treat and within moderation. Giving them too much banana is a bad thing because they contain too much sugar.
Banana should only be a treat and not considered to be a staple of their diet.
With this being said you can try and give one or two small pieces twice a week at most to your hedgehog. It is really up to the individual hedgehog if they will enjoy eating the fruit or not.