An image forming apparatus comprising: a recording material feeding portion configured to feed a recording material from an accommodating portion configured to accommodate the recording material; an image forming portion configured to form an image, on the recording material fed by said recording material feeding portion, with a liquid developer containing toner and an ultraviolet curable agent; an ultraviolet irradiating portion configured to irradiate the image, with ultraviolet radiation, formed on the recording material by said image forming portion; a heating portion (13; 13') configured to heat the recording material on a feeding path (26, 27, 14) of the recording material extending from a recording material feeding position where said recording material feeding portion feeds the recording material to an ultraviolet irradiation position where the image on the recording material is irradiated with the ultraviolet radiation by said ultraviolet irradiating portion; characterized by further comprising: a detecting portion (3; 6) configured to detect a temperature corresponding to a temperature of the recording material which has not yet been heated by said heating portion; and a controller configured to control an output of said heating portion (13; 13') depending on the temperature detected by said detecting portion (3; 6), so that the temperature of the recording material when the recording material enters the ultraviolet irradiation position is within a target temperature range set in advance. a recording material feeding portion configured to feed a recording material from an accommodating portion configured to accommodate the recording material; an image forming portion configured to form an image, on the recording material fed by said recording material feeding portion, with a liquid developer containing toner and an ultraviolet curable agent; an ultraviolet irradiating portion configured to irradiate the image, with ultraviolet radiation, formed on the recording material by said image forming portion; a heating portion (13; 13') configured to heat the recording material on a feeding path (26, 27, 14) of the recording material extending from a recording material feeding position where said recording material feeding portion feeds the recording material to an ultraviolet irradiation position where the image on the recording material is irradiated with the ultraviolet radiation by said ultraviolet irradiating portion; characterized by further comprising: a detecting portion (3; 6) configured to detect a temperature corresponding to a temperature of the recording material which has not yet been heated by said heating portion; and a controller configured to control an output of said heating portion (13; 13') depending on the temperature detected by said detecting portion (3; 6), so that the temperature of the recording material when the recording material enters the ultraviolet irradiation position is within a target temperature range set in advance. a detecting portion (3; 6) configured to detect a temperature corresponding to a temperature of the recording material which has not yet been heated by said heating portion; and a controller configured to control an output of said heating portion (13; 13') depending on the temperature detected by said detecting portion (3; 6), so that the temperature of the recording material when the recording material enters the ultraviolet irradiation position is within a target temperature range set in advance.