Human

Humans are tiny, usually bipedal organic beings from the planet Earth. Though quite weak, fragile, and technologically backwards, they have sometimes aided the Autobots and thwarted the Decepticons once their age-old war spilled onto the humans' primitive homeworld.

In the Marvel comics continuity, Nebulos was also home to a population of indigenous humans.

Transformers have met other human-like species (such as the Femaxians) on occasion, but whether they are truly human usually isn't confirmed one way or the other.

Also known as: fleshlings, squishies, and "dumb stubbies."

From Teletraan I: The Transformers Wiki, a Wikia wiki.