The Blue Origin rocket, named the New Shepard, will blast off next month with Bezos and his brother Mark on board.
The 57-year-old Amazon founder and richest person in the world by Forbes' estimate will become the first person to ride his own rocket to space.
But despite the phallic shape of most rockets, the Bezos craft stands head and shoulders above the rest of the pack with its unusual design - and it has been noticed.
Bezos said he had dreamed of travelling to space since he was 5.
"To see the Earth from space, it changes you. It changes your relationship with this planet, with humanity. It's one Earth," Bezos said in an Instagram post. "I want to go on this flight because it's a thing I've wanted to do all my life. It's an adventure. It's a big deal for me."