An echo erasing device is provided with a signal-to-echo ratio calculation unit 103 which calculates a signal-to-echo ratio SE(n) representing the abundance ratio of an echo component for a received talk signal x(n) on the basis of a first residual coding obtained by using a filter coefficient sequence of an update filter 102 that has been obtained by the previous operations and a second residual coding obtained by using an update filter coefficient sequence resulting from a coefficient update using an arbitrary update step size [mu](n) for the filter coefficient sequence of the update filter 102 that has been obtained by the previous operations, and a residual echo suppression unit 105 which suppresses the echo component included in a microphone input signal on the basis of the signal-to-echo ratio calculated by the signal-to-echo ratio calculation unit 103.