Conductive polymers are organic polymers that possess the ability to conduct electricity, and they have alternate single and double bonds between the carbon atoms. To improve the conductivity, stability, and flexibility of conductive polymers, a number of modification techniques have been used, including chemical vapor deposition (CVD), in situ polymerization, grafting, doping, and many more, making them more crucial for the creation of E-textiles. E-textiles are fabrics with special properties, such as the ability to sense and respond to environmental conditions and stimuli. These fabrics are important in various fields, that is, aerospace, automotive, sportswear, healthcare, and many more. Conductive polymers are a great option for textile electrodes because they have the ability to combine the electrical properties of semiconductors and metals with the benefits associated with conventional polymers, such as affordability, structural variety, adaptability, and longevity. This chapter explains the modification methods of conducting polymers in order to improve its functions in different types of smart textile applications.