Abstract: In this letter, a terahertz (THz) narrow-band band-pass filter with pseudo-elliptical asymmetric response has been designed. The filter contains two elliptic cavity resonators and it is excited through side-wall coupling. The center frequencies of filters are at 0.88THz and 1.041THz. Because traditional machining techniques can not satisfy requirements, silicon machining techniques are used to fabricate proposed filters. From the simulated results using Ansoft HFSS, the relative bandwidths of filters are 0.77% and 0.75% respectively. The proposed filters are simple, compact and capable of achieving a high degree of integration on a single chip. Effects of micromachining process on the filter?s performance are discussed in detail in this letter.