Banana — Food safety facts
Safe to share · Dogs · full breakdown on the linked food page
Safe in moderation. High in sugar — small slices only, especially for small dogs.
Short answer
Yes, a small amount of banana is safe for your dog. Bananas are not toxic but are high in sugar, so only give a few small slices, especially to a small breed. Offer the banana plain, without any peel or additives. Monitor for any stomach upset, and contact your veterinarian if you notice vomiting, diarrhea, or other concerns.