Sekiwake (関脇) is the third highest rank in professional sumo wrestling, and is one of the so-called sanyaku ranks. It is believed to come from guarding the Ozeki (大関 or 関) at his side (脇).

It represents the highest rank a wrestler can achieve by continuously making a majority of wins in tournaments, as there are special promotion criteria for the next highest rank of Ozeki. Unlike the higher ranks of Ozeki and Yokozuna, one will lose the rank immediately after having a makekoshi tournament (more losses than wins).