An echo cancellation device is equipped with: a full-band echo cancellation unit (100a) for generating a pseudo echo signal; a downsampling processing unit (104a) for downsampling a received signal and extracting a low-band component delayed by a delay amount (D1); a delay control unit (105a) for delaying the low-band component by a delay amount (D2); a delay control unit (105b) for delaying the output signal from the delay control unit (105a) by a delay amount (D3); a low-band echo cancelation unit (100b) for generating a pseudo echo signal delayed by a delay amount (D1+D2); and an upsampling processing unit (108) for upsampling the low-band pseudo echo signal and generating a full-band pseudo echo signal delayed by a delay amount (2D1+D2). Therein, the delay control units (105a, 105b) control the delay amounts (D2, D3) in a manner such that a tap length (LA), which is the response time of the adaptive filter of the full-band echo cancelation unit (100a), satisfies LA>=2D1+D2=D2+D3.