KCr5Se8 has a TlV5S8-type structure, containing K ions in one-dimensional tunnels. Deintercalated samples of KxCr5Se8 (0.32 less than or equal to x less than or equal to 0.93) were prepared by leaching method using AlCl3/FeCl3 aqueous solution. These samples showed a broad peak of magnetic susceptibility at ca.130 K. Fe-57-Mossbauer spectra of K-x((Cr0.95Fe0.05)-Fe-57)(5)Se-8 (x=1.0, 0.49) showed a quadrupole doublet at 300 K. Magnetic sextets appeared at 4.2 K in both samples, indicative of magnetic ordering. The observed isomer shift indicated that the charge of Fe is +3 in both samples. It was proposed that Se2- was partially oxidized by the deintercalation.