This article deals with the modern principles of designing and constructing laser therapy apparatuses. These principles include universality, compatibility, operation simplicity, compliance with the State Standards, dataware, servicing, and optimizing the equipment weight and overall dimensions. All these principles were took into account by the `Tekhika' Firm (Russia), while it was creating laser therapy apparatuses. For that reason, the equipment of this firm served as an example of the practical realization of present-day designing and constructing principles. Apart from that, an analysis was made of laser therapy hardware. It has demonstrated that there are several trends in the development of laser therapy equipment. First, there are universal laser therapy apparatuses consisting of a basic block, radiating heads, and attachments. Second, there are portable laser apparatuses. Third, there are highly tailored laser apparatuses designed to carry out a single therapeutic procedure.