  There is rich literature on regular black holes from loop quantum gravity
(LQG), where quantum geometry effects resolve the singularity, leading to a
quantum extension of the classical space-time. As we will see, the mechanism
that resolves the singularity can also trigger conceptually undesirable
features that can be subtle and are often uncovered only after a detailed
examination. Therefore, the quantization scheme has to be chosen rather
astutely. We illustrate the new physics that emerges first in the context of
the eternal black hole represented by the Kruskal space-time in classical
general relativity, then in dynamical situations involving gravitational
collapse, and finally, during the Hawking evaporation process. The emphasis is
on novel conceptual features associated with the causal structure, trapping and
anti-trapping horizons and boundedness of invariants associated with curvature
and matter. This Chapter is not intended to be an exhaustive account of all LQG
results on non-singular black holes. Rather, we have selected a few main-stream
thrusts to anchor the discussion, and provided references where further details
as well as discussions of related developments can be found. In the spirit of
this Volume, the goal is to present a bird's eye view that is accessible to a
broad audience.
