To provide a wave absorber which absorbs radio waves in unwanted bands and has a bandpass performance to allow such radio waves in specific narrow frequencies, for example, 800 MHz to 1 GHz, or 1.8 GHz to 3 GHz, to be passed through that the mainly used for communication means such as ITS, portable telephone, and communication system.

This wave absorber is formed by laminating a wave absorbing layer that an absorbing frequency band is on the side of low frequency, on a heat transfer conversion layer, and a wave absorbing layer thereon that the absorbing frequency band is on the side of high frequency.