A portable smoking instrument comprising a cigarette bar internally provided with an inner cavity allowing a cigarette to be inserted therein and an ash storage part separately connected with the cigarette bar, wherein both ends of the inner cavity are communicated with the outside, and a through hole communicated with the inner cavity is formed in the surface of the cigarette bar; the ash storage part is provided with an ash storage inner cavity communicated with the inner cavity of the cigarette bar. The portable smoking instrument is convenient to use and operate and can be applied and promoted easily, thereby preventing negative influences of smoking on environmental sanitation.