Electric device for the evaporation of volatile substances comprising a housing (1) and a container (2) of volatile substances coupled to said housing, wherein said container is provided with a wick (3) having an upper part (11) protruding from said container and a lower part inside said container, the device further comprising a heating means (5) arranged in said housing to heat said upper part (11) of the wick (3) and a means to regulate the degree of evaporation of said volatile substance, characterized in that said means for regulating the degree of evaporation of the volatile substance, comprises a screen element (4) that can move between a minimum evaporation position in which part of the screen element is interposes between said heating means (5) and said upper part of the wick (11), such that the temperature in the upper part of the wick is minimal and u a maximum evaporation position in which part of the screen element is located below said heating means, such that the temperature at the top of the wick is maximum.Dispositivo eléctrico para la evaporación de sustancias volátiles que comprende una carcasa (1) y un recipiente (2) de sustancias volátiles acoplado a dicha carcasa, en el que dicho recipiente está dotado de una mecha (3) que tiene una parte superior (11) que sobresale de dicho recipiente y una parte inferior en el interior de dicho recipiente, comprendiendo adicionalmente el dispositivo un medio de calentamiento (5) dispuesto en dicha carcasa para calentar dicha parte superior (11) de la mecha (3) y un medio para regular el grado de evaporación de dicha sustancia volátil, caracterizado porque dicho medio para regular el grado de evaporación de la sustancia volátil, comprende un elemento de pantalla (4) que puede desplazarse entre una posición de evaporación mínima en la que parte del elemento de pantalla se interpone entre dicho medio de calentamiento (5) y dicha parte superior de la mecha (11), de tal modo que la temperatura en la parte superior
