<p>We consider the event-triggered finite-time dissipative control problem for fractional-order interconnected systems with an unknown time-varying delay in the state vector. The controller in this paper uses only information of the state vector when an event-triggered condition holds. This contrasts with previous methods, where the information of the state vector was assumed to be always continuously available. Therefore, it is significant in saving communication resources while still maintaining the desired robust control performance. First, we propose a new event-triggered mechanism and a controller. Then, by using the Laplace transform, inequality techniques, and properties of fractional-order calculus, we prove the closed-loop system is finite-time dissipative. Finally, the feasibility of the proposed method is demonstrated by a numerical example with simulation results.</p>