a key structure and a keyboard including multiple key structures are provided . the key structure includes a keycap , a base plate and a scissors - type support member between the keycap and the base plate . the scissors - type support member includes an inner frame having a convex part and an outer frame having a v - shaped notch . the convex part is received in the v - shaped notch . by controlling relative positions between the convex part and the v - shaped notch , the keycap is stably moved in the vertical direction .