Provided is a circuit simulation model that can suitably represent capacitor characteristics, thereby realizing accurate circuit design and circuit analysis. A SPICE model is constituted of a capacitor unit in which a capacitor is replaced with a linear voltage dependent current source, a low-pass filter unit that has a function of extracting a DC bias voltage, a calculation circuit unit that is configured by combining an adder, a multiplier, and the like to perform a calculation of a circuit equation derived from an equivalent circuit for a capacitor such as an idealized C circuit model, an RC circuit model, or the like, and a linear voltage dependent voltage source that applies a total voltage applied across the capacitor to the calculation circuit.