Abstract: Disclosed is a bicycle for water and land including: a first floating means, which is provided on and rotates with a front wheel frame that rotates in conjunction with a handlebar, for unfolding on both sides by means of buoyancy to buoy the front wheel frame when entering water; a second floating means, which is provided on a rear wheel frame, for unfolding on both sides by means of buoyancy to buoy the rear wheel frame when entering water; and propellers, which are provided on a plurality of spokes that are installed on the rear wheel frame so that the surfaces face the direction in which the rear wheel rotates, for generating propelling force in water.