布兰奇出生于巴黎。他的父亲是一个成功的精神科医生谁跑一个时髦的诊所，他被带到了丰富的巴黎附近帕西在原本属于一所房子公主去兰巴拉。

尽管布兰奇从画得到了一些指令亨利GERVEX，他可能会被视为无师自通。他成为一个非常成功的肖像画家，从18世纪英国画家如派生的风格托马斯·庚斯博罗以及马奈和约翰·萨金特。他曾在伦敦，他在那里度过的时间从1870年，以及巴黎，在那里他陈列在沙龙和兴业国立美术学院。他的一个最亲密的朋友是普鲁斯特，谁帮助编辑几个布兰奇的出版物。他也知道亨利·詹姆斯在提到格特鲁德·斯泰因的爱丽丝B.托克拉斯自传。

1902年，雅克·埃米尔·布兰奇接手方向的Académie德拉调色板，在那里他将继续主任直到1911年

在画家的最有名的作品是他的父亲，肖像普鲁斯特（私人收藏，巴黎），诗人皮埃尔Louÿs的Thaulow家庭（奥赛博物馆，巴黎），比亚兹莱（国家肖像画廊，伦敦），和伊薇特吉尔伯特和臭名昭著的美弗吉尼亚Oldoini，郎世宁伯爵夫人其中他父亲的精神疾病治疗。其他的他画包括詹姆斯·乔伊斯，朱莉娅·斯蒂芬，埃德加·德加，克劳德·德彪西，奥古斯特罗丹，科莱特，托马斯·哈代，约翰·萨金特，查尔斯·康德，珀西固安捷和塔玛拉Karsavina如斯特拉文斯基的 火鸟。

他是不可靠的作者一生的肖像：在维多利亚时代晚期：爱德华选美：1870-1914（伦敦：JM登特，1937年）和终身的更肖像，1918年至1938年（伦敦：JM登特，1939年） ，哪些沃尔特·Sickert说：“他是容易扭曲事情，他听到或没有到滔天避免信口开河。”

Blanche was born in Paris. His father was a successful psychiatrist who ran a fashionable clinic, and he was brought up in the rich Parisian neighborhood of Passy in a house that had belonged to thePrincesse de Lamballe.

Although Blanche received some instruction in painting from Henri Gervex, he may be regarded as self-taught. He became a very successful portrait painter, with a style derived from 18th-century English painters such as Thomas Gainsborough as well as Édouard Manet and John Singer Sargent. He worked in London, where he spent time from 1870 on, as well as Paris, where he exhibited at the Salon and theSociété Nationale des Beaux-Arts. One of his closest friends was Marcel Proust, who helped edit several of Blanche's publications. He also knew Henry James and is mentioned in Gertrude Stein's The Autobiography of Alice B. Toklas.

In 1902 Jacques-Émile Blanche took over the direction of the Académie de La Palette, where he would remain director until 1911.
Among the painter's most famous works are portraits of his father, Marcel Proust (private collection, Paris), the poet Pierre Louÿs, the Thaulow family (Musée d'Orsay, Paris), Aubrey Beardsley (National Portrait Gallery, London), and Yvette Guilbert and the infamous beauty Virginia Oldoini, Countess of Castiglione whom his father had treated for mental illness. Others he painted included James Joyce,Julia Stephen, Edgar Degas, Claude Debussy, Auguste Rodin, Colette, Thomas Hardy, John Singer Sargent,Charles Conder, Percy Grainger, and Tamara Karsavina as Stravinsky's Firebird.

He was the author of the unreliable Portraits of a Lifetime: the late Victorian era: the Edwardian pageant: 1870–1914 (London: J.M. Dent, 1937) and More Portraits of a Lifetime, 1918–1938 (London: J.M. Dent, 1939), about which Walter Sickert said "he is liable to twist things he hears or doesn't into monstrous fibs".