The present invention relates to a stroller, and provides a stroller including: a seat part, and a seat accommodation part configured to accommodate a seat; a connection frame part including a first connection frame configured to support the seat and to include vertical portions and lateral portions, and a second connection frame formed in a “U” shape including vertical portions and a lateral portion and configured such that the vertical portions are rotatably connected to the first connection frame; and a bicycle structure including a main frame configured such that the connection frame part is mounted thereon in such a manner that the first connection frame is coupled to the front end thereof and the second connection frame is coupled to the rear end thereof, a front wheel installed under the front of the main frame, and rear wheels installed under the back of the main frame.