Provided is a crane assembling method which can easily assemble a crane. In the crane assembling method, a step of connecting an (n+1)th partial jib includes the steps of: placing a distal end of an nth partial jib connected to a boom on a pedestal on the ground; connecting an upper side connector on a proximal end of the (n+1)th partial jib to an upper side connector on the distal end of the nth partial jib in a state where the (n+1)th partial jib is lifted; mounting a wheel on the lower side connector on a distal end of the (n+1)th partial jib; and connecting a lower side connector of the nth partial jib and a lower side connector on a proximal end of the (n+1)th partial jib to each other by lifting the nth partial jib.