A portable practice instrument comprises a hitting pad, a fastening band, a holding board and two support pads. The hitting pad is located on the holding board. The two support pads are located below the holding board to form a housing groove therebetween. The holding board has a first threading slot and a second threading slot at two opposite ends outside the hitting pad. The fastening band threads through the first threading slot and the second threading slot via the housing groove. Thus a dual-purpose practice instrument is formed, which not only can be easily carried by users, but also can be selectively wrapped on a user's thigh through the fastening band or laid stably on a desktop through the two support pads with the fastening band threading through the housing groove for hitting practice according to onsite environment, thereby meets use requirements.