Episode Ratings Cinderella's Stepsister

Date	Episode	Nationwide	Seoul
2010-03-31	1	16.7 (4th)	16.2 (4th)
2010-04-01	2	16.4 (5th)	15.8 (5th)
2010-04-07	3	16.8 (4th)	16.4 (5th)
2010-04-08	4	18.0 (4th)	17.3 (4th)
2010-04-14	5	19.7 (2th)	19.1 (3th)
2010-04-15	6	18.6 (3th)	17.8 (3th)
2010-04-21	7	18.5 (4th)	17.8 (3th)
2010-04-22	8	19.0 (2th)	18.6 (2th)
2010-04-28	9	19.2 (3th)	18.8 (3th)
2010-04-29	10	20.8 (2th)	20.6 (2th)
2010-05-05	11	18.8 (3th)	18.4 (3th)
2010-05-06	12	20.5 (2th)	20.3 (1th)
2010-05-12	13	18.1 (3th)	18.4 (2th)
2010-05-13	14	18.7 (2th)	18.4 (3th)
2010-05-19	15	19.0 (1th)	19.1 (1th)
2010-05-20	16	16.8 (5th)	17.1 (3th)
2010-05-26	17	23.2 (1th)	23.8 (1th)
2010-05-27	18	21.0 (1th)	22.1 (1th)
2010-06-02	19	22.3 (1th)	23.6 (1th)
2010-06-03	20	22.7 (1th)	23.7 (1th)
Average		-	-

Source: TNS Media Korea