Ester Cosani Sologuren (24 December 1914 – March 2001) was a Chilean writer and illustrator.
[2][3] Cosani's work as a cartoonist began for the magazine El Colegial.
[4] She later participated in drafting the charter of the Chilean Drawing Alliance, which she signed in 1941, along with illustrators Carmen Eysaud, Elizabeth Wilkens, and Elena Poirier [es].
In 1951 she was awarded the Director's Prize of the National Theater for her work La casa de las ratas.
She also narrated a children's radio program named La cajita de música.