Yuzuru Inahama Nagoya University In rough stochastic PDE theory of Hairer type, rough path lifts with respect to the space variable of two-parameter continuous Gaussian processes play a main role. A prominent example of such processes is the solution of the stochastic heat equation under the periodic condition. The main objective of this paper is to show that the law of the spatial lift of this process satisfies a Schilder type large deviation principle on the continuous path space over a geometric rough path space. This automatically implies Freidlin-Wentzell type Large deviation for solutions of (scaled) rough stochastic PDEs. Our method is a "two-parameter version" of Friz-Victoir's.