The Chichibu Railway 6000 series (秩父鉄道6000系) is an electric multiple unit (EMU) train type for express services on the Chichibu Main Line operated by the private railway operator Chichibu Railway in Japan since 2006.

The DeHa 6100 car is fitted with two lozenge-type pantographs.

Conversion involved sealing the centre pair of side doors and installing transverse seating displaced from Seibu 10000 series limited express EMUs when they were refurbished.

[1] The seats are arranged in facing bays, and no longer rotate.

[3] In October 2014, set 6003 was repainted in a revival beige and brown livery based on that carried by the former 300 series trains.