A bicycle simulation apparatus includes: a steering angle sensor which detects a steering angle of handlebars; a visual display which displays scenes based on a simulated travel speed and the steering angle of the handlebars; and a crank position detector which detects rotational positions of cranks. The crank position detector includes two detected protrusions on a crankshaft and left and right approach sensors. A warning section of a main controller issues warnings if it is determined that the steering angle exceeds a predetermined angle to the left or right during simulated traveling, and if it is also determined by the crank position detector that the crank is directed downward during a sharp turning operation of the handlebars. The bicycle simulation apparatus enables a more realistic driving simulation in consideration of rotational positions of simulator pedals and cranks.