The Chichibu Railway Class DeKi 300 (秩父鉄道デキ300形) is a Bo-Bo wheel arrangement DC electric locomotive type operated by the private railway operator Chichibu Railway in Saitama Prefecture, Japan, primarily on freight services, since 1967.

[1] As of 1 April 2016[update], all of the original three locomotives are in operation.

[2] Three locomotives, DeKi 301 to 303, were built in 1967.

[1] The design was broadly based on the earlier Class DeKi 200 locomotives, with four 230 kW traction motors, although the non-standard bogie design of the DeKi 200 was not used.

[1] The cab window sun visors of the DeKi 200 were also discontinued on the DeKi 300.