A spectrophotometric catalog is presented, combining results of numerous observations by Pulkovo astronomers at different observing sites. The catalog consists of three parts: the first contains the data of 602 stars in the spectral range 320-735 nm with a resolution 5 nm; the second one contains 285 stars in the spectral range of 500-1080 nm with resolution10 nm and the third one contains 278 stars combined from the preceding catalogs in spectral range 320-1080 nm with resolution 10 nm. The data are presented in the absolute energy units W/mm, with step of 2.5 nm and with an accuracy no more than 1.5 - 2.0%.