An air blade includes a body, an airflow channel, and an anti-resistance structure. The body has a central axis. The airflow channel is located on one side of the body which is parallel to the central axis of the body. The anti-resistance structure is located on the other side of the body corresponding to the airflow channel. Therefore, the anti-resistance structure can prevent the water resistance, and the air can be led into the water along the airflow channel, so that the air content in the water can be increased.一種空氣刀,其包含本體、空氣流道以及撥水結構。本體具有一中心軸,空氣流道位於本體之一側,並與本體之中心軸平行,撥水結構位於本體之另一側,並相對應於空氣流道。藉此,可透過撥水結構對抗水中阻力將水撥開,並由空氣流道將空氣帶入水中,提升水中含氣量。100‧‧‧空氣刀110‧‧‧本體120‧‧‧空氣流道130‧‧‧撥水結構
