Place 2 Tbsp of peanut butter into the center of each tortilla and spread evenly, leaving a 1" border all the way around.
Peel banana and gently straighten the banana to remove the bend. Place banana directly into center of tortilla on top of the peanut butter.
Wrap one side of the tortilla over the banana, pressing gently to secure the peanut butter to the banana then roll. The peanut butter will secure the tortilla to the banana.