Arthur Joseph Munby (19 August 1828 – 29 January 1910) was a British diarist, poet, portrait photographer, barrister and solicitor.

He was educated at St Peter's School, York and Trinity College, Cambridge, graduating with a BA in 1851, and was called to the Bar from Lincoln's Inn in 1855.

He taught Latin at the Working Men's College for more than a decade and helped promote the Working Men's College Volunteer Corps, a response to the national call in 1859 for Volunteer Rifle Corps in response to a perceived war threat from Napoleon III.

He collected hundreds of photographs of such subjects as women who worked at collieries, kitchen maids, milkmaids, charwomen, and acrobats.

For example, she used the slave band Munby gave her to display the fact that she was a working-class woman, and that she was not ashamed of it; this can be seen in Cullwick’s journal when she says "my hands and arms are tho' chief to me, to get my living with.

[5] They married secretly in 1873 but Cullwick resisted his efforts to place her in the role of a Victorian wife of his class.

Their marriage was kept secret from all but a few close friends and Munby revealed it to his brother only a few months before his own death from pneumonia[6] in Pyrford, Surrey, on 29 January 1910.