Participatory Design (PD) is a design methodology in which the future users of a design participate as co-designers in the design process. It is a value-centered design approach because of its commitment to the democratic and collective shaping of a better future. This chapter builds forth on the Scandinavian Participatory Design tradition. We discuss why the design process is as important as the final result, the product, or service. The creative application of Participatory Design methods facilitates a design process in which values emerge and become inscribed in a prototype. We present PD’s guiding principles: equalizing power relations, democratic practices, situation-based action, mutual learning, tools and techniques, and alternative visions about technology. In addition, we discuss some value practices and design methods informed by our PD projects in health care and the public sector. We maintain that Participatory Design increases the chance that the final result of a design process represents the values of the future users.