The authors investigate the almost periodic solution of neutral functional equation with infinite delay of the following d/dt[x(t)-∫⁰_-∞q(s)x(t+s)ds］=A(t,x)x(t)+f(t,x_t) Some results on the existence and uniqueness of almost periodic solutions are obtained by use of C_h space, matrix measure and Krasnoselskii's fixed theorem. Especially, whenq(s)is zero matrix, we derive sufficient conditions for the existence of a unique and uniformly stable almost periodic solution, which generalizes several results in references［1～5］.