This book presents current research in the study of polypyrrole, including the preparation of conducting polypyrrole in conventional medium and ionic liquid medium; matrix assisted pulsed laser evaporation of polypyrrole; synthesised polypyrrole/Al flake composite using various corrosion inhibiting dopants; the influence of solution pH on the electrosynthesis and properties of polypyrrole films; immobilisation of enzymes on polypyrrole and potential applications and the recent advances in synthesis of polypyrrole nanostructures.