diff --git a/configs/base-treemacs.el b/configs/base-treemacs.el
new file mode 100644
index 0000000..9c12943
--- /dev/null
+++ b/configs/base-treemacs.el
@@ -0,0 +1,87 @@
+;;; base-treemacs.el --- Extensiones/paquetes instalados y su configuración 	-*- lexical-binding: t -*-
+
+;; Author: kj <webmaster@outcontrol.net>
+;; URL: https://git.kj2.me/kj/confi-emacs-actual
+
+;;; Commentary:
+
+;;; Code:
+
+(use-package treemacs
+  :defer t
+  :straight t
+  :commands (treemacs-follow-mode
+             treemacs-filewatch-mode
+             treemacs-fringe-indicator-mode
+             treemacs-git-mode)
+  :custom-face
+  (cfrs-border-color ((t (:background ,(face-foreground 'font-lock-comment-face nil t)))))
+  :bind (([f9]        . treemacs)
+         ([f8]        . treemacs-display-current-project-exclusively)
+         ([f7]        . treemacs-add-and-display-current-project)
+         ("C-x t 1"   . treemacs-delete-other-windows)
+         ("C-x t b"   . treemacs-bookmark)
+         ("C-x t C-f" . treemacs-find-file)
+         ("C-x t C-t" . treemacs-find-tag)
+         :map treemacs-mode-map
+         ([mouse-1]   . treemacs-single-click-expand-action))
+  :config
+  (setq treemacs-collapse-dirs           (if treemacs-python-executable 3 0)
+        treemacs-missing-project-action  'remove
+        treemacs-sorting                 'alphabetic-asc
+        treemacs-follow-after-init       t
+        treemacs-width                   30)
+  :config
+  (treemacs-follow-mode t)
+  (treemacs-filewatch-mode t)
+  (pcase (cons (not (null (executable-find "git")))
+               (not (null (executable-find "python3"))))
+    (`(t . t)
+     (treemacs-git-mode 'deferred))
+    (`(t . _)
+     (treemacs-git-mode 'simple))))
+
+(use-package treemacs-projectile
+  :defer t
+  :straight t
+  :after projectile
+  :bind (:map projectile-command-map
+              ("h" . treemacs-projectile)))
+
+(use-package treemacs-magit
+  :defer t
+  :straight
+  :after magit
+  :commands treemacs-magit--schedule-update
+  :hook ((magit-post-commit
+          git-commit-post-finish
+          magit-post-stage
+          magit-post-unstage)
+         . treemacs-magit--schedule-update))
+
+(use-package treemacs-persp
+  :defer t
+  :straight t
+  :after persp-mode
+  :demand t
+  :functions treemacs-set-scope-type
+  :config (treemacs-set-scope-type 'Perspectives))
+
+;; `lsp-mode' and `treemacs' integration
+(use-package lsp-treemacs
+  :defer t
+  :straight t
+  :after lsp-mode
+  :bind (:map lsp-mode-map
+              ("C-<f8>" . lsp-treemacs-errors-list)
+              ("M-<f8>" . lsp-treemacs-symbols)
+              ("s-<f8>" . lsp-treemacs-java-deps-list))
+  :init (lsp-treemacs-sync-mode 1)
+  :config
+  (with-eval-after-load 'ace-window
+    (when (boundp 'aw-ignored-buffers)
+      (push 'lsp-treemacs-symbols-mode aw-ignored-buffers)
+      (push 'lsp-treemacs-java-deps-mode aw-ignored-buffers))))
+
+(provide 'base-treemacs)
+;;; base-treemacs.el ends here
diff --git a/init.el b/init.el
index d3e7947..4b47034 100644
--- a/init.el
+++ b/init.el
@@ -45,6 +45,7 @@
 (require 'base-org)
 (require 'base-lsp)
 (require 'base-company)
+(require 'base-treemacs)
 (require 'base-ctags)
 (require 'base-ivy)
 (require 'base-keys)