Umeshiso utensils are dishwasher safe. We personally prefer to hand-wash them to best protect the finish, but this is ultimately your choice based on what you like. Over time, any kind of silverware will develop tiny surface scratches from jostling against other silverware in a dishwasher. If you’re ok with the spoons experiencing the same wear as other silverware, dishwasher will be totally fine. If you’d like to keep the finish pristine, we recommend hand-washing and avoiding packing the spoons tightly against other silverware.