Once you have connected MetaMask with your Binance account, there's no way to change that address. You will need to create a new Ethereum address for it! Here is how... On this page , click on "Add Custom Token" at the bottom right corner of the screen. This is where we are going to be changing our Ethereum address with MetaMask! Add any token/token symbol (BNB) here as well if you want! When finished, select save and then next when prompted.