What was the first movie with a cyborg as a leading character?

Question

I only remember this one (1978):
http://www.imdb.com/title/tt0080010/
(The cyborg assembly line was impressive).

Nope, Golem is not a cyborg, but a homunculus, a result of artificial breeding of organic matter.

I am asking about human-robot mix.

Answer 1

It was an old silent picture called Metropolis

Answer 2

" Paul Wegener's Golem series, of which especially The Golem: How He Came Into the World (also released as The Golem, 1920, USA 1921) is famous. "

Answer 3

How about "The Stepford Wives" (1975)

If we expand into television, how about the Star Trek episode, "What are Little Girls Made Of?" (1966)

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