A fluid transmission device for delivering fluid is disclosed. The fluid transmission device comprises a valve base having an input passage and an output passage, a first fluid transmission module and a second fluid transmission module are disposed on the first surface and the second surface of the valve base, respectively. Each fluid transmission module has an actuating module, a valve cover and a valve membrane disposed between the valve base and the valve cover, the actuating module is disposed on the valve cover and defined a first and a second pressure chambers, respectively, wherein the two actuating module bend in the same frequency and has a phase lag, which make the interior volume of the first and second pressure chambers changed, respectively, and the fluid is driven by the difference of pressures to flow from the input passage through the first transmission module, the valve base, and the second transmission module, and flow out form the output passage.一種流體輸送裝置,用以傳送一流體,其中閥體承載部具有入口及出口流道;第一及第二流體輸送模組分別設於閥體承載部之第一及第二表面上,且兩者均具有致動組件、閥體蓋體及閥體薄膜,閥體薄膜設於閥體承載部及閥體蓋體之間,致動組件設於閥體蓋體上,且與其表面形成第一及第二壓力腔室;其中第一及第二流體輸送模組之致動組件以相同振動頻率且具有一相位差作動,使第一及第二壓力腔室體積改變,產生壓力差以推動流體由閥體承載部之入口流道流入,經第一流體輸送模組、閥體承載部及第二流體輸送模組,再由閥體承載部之出口流道流出。3‧‧‧流體輸送裝置31‧‧‧第一流體輸送模組32‧‧‧第二流體輸送模組30‧‧‧閥體承載部301‧‧‧第一表面3010‧‧‧開口3011‧‧‧出口暫存腔302‧‧‧入口流道303‧‧‧出口流道304‧‧‧第二表面300a、300b、311c、321a、321b‧‧‧凹槽306、327‧‧‧微凸結構311、321‧‧‧閥體蓋體3110、3210‧‧‧入口閥門通道3212‧‧‧入口暫存腔3111、3211‧‧‧出口閥門通道3113‧‧‧第一壓力腔室310、320‧‧‧閥體薄膜3100、3101、3200、3201‧‧‧鏤空閥開關3100a、3101a‧‧‧閥片3100b、3101b‧‧‧鏤空孔洞3100c、3101c‧‧‧延伸部312、322‧‧‧致動組件3120‧‧‧振動薄膜3121‧‧‧致動器313、323‧‧‧蓋體314‧‧‧第一密封環315、325‧‧‧第二密封環316、326‧‧‧第三密封環
