A snare adjustment device includes a snare protection frame having snares connected thereto, a holding body, a slider slidably connected to the holding body and moving the snare protection frame and the snares along with it, a switch member, and a manual lever. The switch member includes a latch section movable by a push section to engage with or disengage from the slider, such that the slider is stopped from or allowed to move, respectively. The manual lever is pivotally connected to the holding body and can be swung up and down for moving the slider. The manual lever includes a lever section, which and the push section of the switch member are protruded beyond a reference side of the holding body. Therefore, a drum player can hit the push and the lever section with a drum stick to quickly switch the snares between a tightened and a loosened state.