The aim of the present paper is to describe four new species of fishes which have been discovered in September 1993 during an ichthyological survey of Danau Sentarum Wildlife Reserve (DSWR) in the province of Kalimantan Barat, Indonesia. DSWR is located in the basin of the Kapuas, the largest river in Borneo. From the point of view of the fish fauna, the Kapuas is the best known basin in Indonesia; it has attracted the attention of scientists since the end of the 19th century. Kottelat (1991: 274) recorded that 303 species where known from the basin, and the 1993 survey resulted in the discovery of several new species and new records, so that the actual number is about 315 (Kottelat & Widjanarti, in preparation).