Sink Strainer Basket with Odor Prevention Arrangement

A sink strainer basket for a sink having a sink drainage hole, comprising:

• a strainer body having a bottom panel, a drainage cavity and a drainage opening communicating with said drainage cavity;
• and
• an odor prevention arrangement, which comprises:
• a drain regulator movably provided on a bottom side of said strainer body to normally close said drainage opening;
• and
• a supporting member supported by said strainer body;
• and
• a resilient member mounted on said supporting member and arranged to exert a biasing force toward said drain regulator so as to normally drive said drain regulator to close said drainage opening, wherein when a predetermined amount of sewage is allowed to pour into said drainage cavity, said biasing force exerted by said resilient member is temporarily overcome by said force caused by flowing of said sewage so that said drain regulator is arranged to move away from said drainage opening for allowing said sewage to drain into said sink drainage hole.