This chapter contains sections titled: Summary Antimicrobial Peptides: Definition and Properties Examples of Natural Antimicrobial Peptides Antimicrobial Peptides by Design Mode of Action of Antimicrobial Peptides Production of Antimicrobial Peptides Incorporation of Antimicrobial Peptides Into Polymers Antimicrobial Peptide Encapsulation by Liposomes or Microparticles Nanostructure-Forming Antimicrobial Peptides Future Trends Acknowledgments References