In the building trades, a joiner is a type of a carpenter that cuts and fits joints in wood without the use of nails, screws, or other metal fasteners. Joiners usually work in a workshop, because the formation of various joints usually requires non-portable machinery; in contrast, most other kinds of carpenter usually work on site. A "joiner" usually produces items such as interior and exterior doors, windows, stairs, tables, bookshelves etc; cabinet makers are often regarded as producers of fine joinery.

The terms joinery and joiner are obsolete in the USA,[verification needed] although the main trade union for carpenters still calls itself the United Brotherhood of Carpenters and Joiners of America.

In the UK, an apprentice of wood occupations could choose to study bench joinery or site carpentry and joinery; bench joinery is the preparation, setting out, and manufacture of joinery components, while site carpentry and joinery focuses on the installation of the joinery components, and on the setting out and fabrication of timber elements used in construction.