Henry Mayo Bateman (15 February 1887 – 11 February 1970, Gozo) was a British humorous artist and cartoonist.
H. M. Bateman was noted for his "The Man Who..." series of cartoons, featuring comically exaggerated reactions to minor and usually upper-class social gaffes, such as "The Man Who Lit His Cigar Before the Royal Toast", "The Man Who Threw a Snowball at St. Moritz" and "The Boy Who Breathed on the Glass at the British Museum." which appeared in the satirical magazine Punch.
He was born in the small village of Sutton Forest in New South Wales, Australia. His parents were Henry Charles Bateman and Rose Mayo. His father had left England for Australia in 1878 at the age of 21 to seek his fortune, then returned to England briefly in 1885 before going back with an English wife. Soon after Henry was born, his strong-willed mother insisted that they return to London 'and civilisation'. He had one sister, Phyllis, three years younger.
Bateman was always drawing from an early age, consistently producing funny drawings that told stories. He was inspired by comics, and he had a keen critical eye, and was enthusiastically drawing at every available moment. At the age of fourteen he had already decided that he would draw for publication. In 1901, the cartoonist Phil May, in response to a letter from Rose, showed interest in his drawings, and that year he was inspired by an exhibition of black-and-white art at the Victoria and Albert Museum. His father had initially decided that his son should follow him into business, but eventually, after many arguments between him and Rose, his father financed his study at the Westminster School of Art which he commenced at the age of sixteen. He did well, but was bored by the lifeless "life" classes and after qualifying at Westminster transferred his study to the New Cross Art School. He also did some practical work at the studio Charles van Havenmaet.